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Finding the Fourth Proportional to 402,456.30, 554,834.61 and 321,060.71

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Solution

The fourth proportional to 402,456.30, 554,834.61 and 321,060.71 is: 442,620.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,456.30 : 554,834.61 = 321,060.71 : x
  2. Step 2: Convert to fraction form
    402,456.30/554,834.61 = 321,060.71/x
  3. Step 3: Cross multiply
    402,456.30x = 554,834.61 × 321,060.71
  4. Step 4: Simplify right side
    402,456.30x = 178,135,591,045.00
  5. Step 5: Solve for x
    x = 178,135,591,045.00/402,456.30
  6. Step 6: Final answer
    x = 442,620.95

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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.