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Finding the Fourth Proportional to 426,297.60, 639,385.92 and 145,774.08

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Solution

The fourth proportional to 426,297.60, 639,385.92 and 145,774.08 is: 218,640.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,297.60 : 639,385.92 = 145,774.08 : x
  2. Step 2: Convert to fraction form
    426,297.60/639,385.92 = 145,774.08/x
  3. Step 3: Cross multiply
    426,297.60x = 639,385.92 × 145,774.08
  4. Step 4: Simplify right side
    426,297.60x = 93,205,894,252.95
  5. Step 5: Solve for x
    x = 93,205,894,252.95/426,297.60
  6. Step 6: Final answer
    x = 218,640.44

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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.