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Finding the Fourth Proportional to 718,963.64, 992,123.76 and 396,673.70

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Solution

The fourth proportional to 718,963.64, 992,123.76 and 396,673.70 is: 547,384.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,963.64 : 992,123.76 = 396,673.70 : x
  2. Step 2: Convert to fraction form
    718,963.64/992,123.76 = 396,673.70/x
  3. Step 3: Cross multiply
    718,963.64x = 992,123.76 × 396,673.70
  4. Step 4: Simplify right side
    718,963.64x = 393,549,402,737.11
  5. Step 5: Solve for x
    x = 393,549,402,737.11/718,963.64
  6. Step 6: Final answer
    x = 547,384.29

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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.