Home / 830,147.20-1,245,220.80-410,243.20

Finding the Fourth Proportional to 830,147.20, 1,245,220.80 and 410,243.20

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Solution

The fourth proportional to 830,147.20, 1,245,220.80 and 410,243.20 is: 615,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,147.20 : 1,245,220.80 = 410,243.20 : x
  2. Step 2: Convert to fraction form
    830,147.20/1,245,220.80 = 410,243.20/x
  3. Step 3: Cross multiply
    830,147.20x = 1,245,220.80 × 410,243.20
  4. Step 4: Simplify right side
    830,147.20x = 510,843,365,698.56
  5. Step 5: Solve for x
    x = 510,843,365,698.56/830,147.20
  6. Step 6: Final answer
    x = 615,364.80

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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.