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Finding the Fourth Proportional to 661,807.80, 992,711.70 and 476,566.20

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Solution

The fourth proportional to 661,807.80, 992,711.70 and 476,566.20 is: 714,849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,807.80 : 992,711.70 = 476,566.20 : x
  2. Step 2: Convert to fraction form
    661,807.80/992,711.70 = 476,566.20/x
  3. Step 3: Cross multiply
    661,807.80x = 992,711.70 × 476,566.20
  4. Step 4: Simplify right side
    661,807.80x = 473,092,842,564.54
  5. Step 5: Solve for x
    x = 473,092,842,564.54/661,807.80
  6. Step 6: Final answer
    x = 714,849.30

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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.