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Finding the Fourth Proportional to 718,854.78, 992,016.78 and 396,584.94

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Solution

The fourth proportional to 718,854.78, 992,016.78 and 396,584.94 is: 547,285.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,854.78 : 992,016.78 = 396,584.94 : x
  2. Step 2: Convert to fraction form
    718,854.78/992,016.78 = 396,584.94/x
  3. Step 3: Cross multiply
    718,854.78x = 992,016.78 × 396,584.94
  4. Step 4: Simplify right side
    718,854.78x = 393,418,915,175.29
  5. Step 5: Solve for x
    x = 393,418,915,175.29/718,854.78
  6. Step 6: Final answer
    x = 547,285.66

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1.5x scale

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.