Home / 661,531.32-913,000.41-643,517.73

Finding the Fourth Proportional to 661,531.32, 913,000.41 and 643,517.73

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Solution

The fourth proportional to 661,531.32, 913,000.41 and 643,517.73 is: 888,139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,531.32 : 913,000.41 = 643,517.73 : x
  2. Step 2: Convert to fraction form
    661,531.32/913,000.41 = 643,517.73/x
  3. Step 3: Cross multiply
    661,531.32x = 913,000.41 × 643,517.73
  4. Step 4: Simplify right side
    661,531.32x = 587,531,951,332.27
  5. Step 5: Solve for x
    x = 587,531,951,332.27/661,531.32
  6. Step 6: Final answer
    x = 888,139.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.