Home / 828,007.20-1,242,010.80-509,142.60

Finding the Fourth Proportional to 828,007.20, 1,242,010.80 and 509,142.60

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Solution

The fourth proportional to 828,007.20, 1,242,010.80 and 509,142.60 is: 763,713.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,007.20 : 1,242,010.80 = 509,142.60 : x
  2. Step 2: Convert to fraction form
    828,007.20/1,242,010.80 = 509,142.60/x
  3. Step 3: Cross multiply
    828,007.20x = 1,242,010.80 × 509,142.60
  4. Step 4: Simplify right side
    828,007.20x = 632,360,607,940.08
  5. Step 5: Solve for x
    x = 632,360,607,940.08/828,007.20
  6. Step 6: Final answer
    x = 763,713.90

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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.