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Finding the Fourth Proportional to 718,898.04, 992,082.60 and 396,608

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Solution

The fourth proportional to 718,898.04, 992,082.60 and 396,608 is: 547,320.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,898.04 : 992,082.60 = 396,608 : x
  2. Step 2: Convert to fraction form
    718,898.04/992,082.60 = 396,608/x
  3. Step 3: Cross multiply
    718,898.04x = 992,082.60 × 396,608
  4. Step 4: Simplify right side
    718,898.04x = 393,467,895,820.80
  5. Step 5: Solve for x
    x = 393,467,895,820.80/718,898.04
  6. Step 6: Final answer
    x = 547,320.86

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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.