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Finding the Fourth Proportional to 319,355.60, 479,023.02 and 129,759.93

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Solution

The fourth proportional to 319,355.60, 479,023.02 and 129,759.93 is: 194,635.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,355.60 : 479,023.02 = 129,759.93 : x
  2. Step 2: Convert to fraction form
    319,355.60/479,023.02 = 129,759.93/x
  3. Step 3: Cross multiply
    319,355.60x = 479,023.02 × 129,759.93
  4. Step 4: Simplify right side
    319,355.60x = 62,157,993,543.59
  5. Step 5: Solve for x
    x = 62,157,993,543.59/319,355.60
  6. Step 6: Final answer
    x = 194,635.68

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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.