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Finding the Fourth Proportional to 485,624.10, 727,658.55 and 319,217.70

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Solution

The fourth proportional to 485,624.10, 727,658.55 and 319,217.70 is: 478,315.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,624.10 : 727,658.55 = 319,217.70 : x
  2. Step 2: Convert to fraction form
    485,624.10/727,658.55 = 319,217.70/x
  3. Step 3: Cross multiply
    485,624.10x = 727,658.55 × 319,217.70
  4. Step 4: Simplify right side
    485,624.10x = 232,281,488,716.34
  5. Step 5: Solve for x
    x = 232,281,488,716.34/485,624.10
  6. Step 6: Final answer
    x = 478,315.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.