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Finding the Fourth Proportional to 389,886.61, 584,850.57 and 109,425.73

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Solution

The fourth proportional to 389,886.61, 584,850.57 and 109,425.73 is: 164,144.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,886.61 : 584,850.57 = 109,425.73 : x
  2. Step 2: Convert to fraction form
    389,886.61/584,850.57 = 109,425.73/x
  3. Step 3: Cross multiply
    389,886.61x = 584,850.57 × 109,425.73
  4. Step 4: Simplify right side
    389,886.61x = 63,997,699,101.04
  5. Step 5: Solve for x
    x = 63,997,699,101.04/389,886.61
  6. Step 6: Final answer
    x = 164,144.39

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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.