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Finding the Fourth Proportional to 521,707.20, 782,560.80 and 206,001.60

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Solution

The fourth proportional to 521,707.20, 782,560.80 and 206,001.60 is: 309,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,707.20 : 782,560.80 = 206,001.60 : x
  2. Step 2: Convert to fraction form
    521,707.20/782,560.80 = 206,001.60/x
  3. Step 3: Cross multiply
    521,707.20x = 782,560.80 × 206,001.60
  4. Step 4: Simplify right side
    521,707.20x = 161,208,776,897.28
  5. Step 5: Solve for x
    x = 161,208,776,897.28/521,707.20
  6. Step 6: Final answer
    x = 309,002.40

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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.