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Finding the Fourth Proportional to 870,924,608.80, 1,306,386,913.20 and 850,769,216.80

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Solution

The fourth proportional to 870,924,608.80, 1,306,386,913.20 and 850,769,216.80 is: 1,276,153,825.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,924,608.80 : 1,306,386,913.20 = 850,769,216.80 : x
  2. Step 2: Convert to fraction form
    870,924,608.80/1,306,386,913.20 = 850,769,216.80/x
  3. Step 3: Cross multiply
    870,924,608.80x = 1,306,386,913.20 × 850,769,216.80
  4. Step 4: Simplify right side
    870,924,608.80x = 1,111,433,770,980,933,504
  5. Step 5: Solve for x
    x = 1,111,433,770,980,933,504/870,924,608.80
  6. Step 6: Final answer
    x = 1,276,153,825.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.