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Finding the Fourth Proportional to 530,478.72, 732,060.18 and 288,760.95

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Solution

The fourth proportional to 530,478.72, 732,060.18 and 288,760.95 is: 398,489.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,478.72 : 732,060.18 = 288,760.95 : x
  2. Step 2: Convert to fraction form
    530,478.72/732,060.18 = 288,760.95/x
  3. Step 3: Cross multiply
    530,478.72x = 732,060.18 × 288,760.95
  4. Step 4: Simplify right side
    530,478.72x = 211,390,393,033.97
  5. Step 5: Solve for x
    x = 211,390,393,033.97/530,478.72
  6. Step 6: Final answer
    x = 398,489.86

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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.