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Finding the Fourth Proportional to 398,355.70, 549,691.50 and 235,008.76

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Solution

The fourth proportional to 398,355.70, 549,691.50 and 235,008.76 is: 324,288.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,355.70 : 549,691.50 = 235,008.76 : x
  2. Step 2: Convert to fraction form
    398,355.70/549,691.50 = 235,008.76/x
  3. Step 3: Cross multiply
    398,355.70x = 549,691.50 × 235,008.76
  4. Step 4: Simplify right side
    398,355.70x = 129,182,317,797.54
  5. Step 5: Solve for x
    x = 129,182,317,797.54/398,355.70
  6. Step 6: Final answer
    x = 324,288.86

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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.