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Finding the Fourth Proportional to 621,272.94, 930,691.50 and 321,949.86

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Solution

The fourth proportional to 621,272.94, 930,691.50 and 321,949.86 is: 482,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,272.94 : 930,691.50 = 321,949.86 : x
  2. Step 2: Convert to fraction form
    621,272.94/930,691.50 = 321,949.86/x
  3. Step 3: Cross multiply
    621,272.94x = 930,691.50 × 321,949.86
  4. Step 4: Simplify right side
    621,272.94x = 299,635,998,128.19
  5. Step 5: Solve for x
    x = 299,635,998,128.19/621,272.94
  6. Step 6: Final answer
    x = 482,293.66

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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.