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Finding the Fourth Proportional to 718,453.35, 991,472.58 and 396,174.87

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Solution

The fourth proportional to 718,453.35, 991,472.58 and 396,174.87 is: 546,725.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,453.35 : 991,472.58 = 396,174.87 : x
  2. Step 2: Convert to fraction form
    718,453.35/991,472.58 = 396,174.87/x
  3. Step 3: Cross multiply
    718,453.35x = 991,472.58 × 396,174.87
  4. Step 4: Simplify right side
    718,453.35x = 392,796,520,490.07
  5. Step 5: Solve for x
    x = 392,796,520,490.07/718,453.35
  6. Step 6: Final answer
    x = 546,725.16

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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.