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Finding the Fourth Proportional to 389,635.30, 584,452.95 and 319,593.70

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Solution

The fourth proportional to 389,635.30, 584,452.95 and 319,593.70 is: 479,390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,635.30 : 584,452.95 = 319,593.70 : x
  2. Step 2: Convert to fraction form
    389,635.30/584,452.95 = 319,593.70/x
  3. Step 3: Cross multiply
    389,635.30x = 584,452.95 × 319,593.70
  4. Step 4: Simplify right side
    389,635.30x = 186,787,480,766.42
  5. Step 5: Solve for x
    x = 186,787,480,766.42/389,635.30
  6. Step 6: Final answer
    x = 479,390.55

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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.