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Finding the Fourth Proportional to 438,959.75, 658,439.64 and 123,416.64

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Solution

The fourth proportional to 438,959.75, 658,439.64 and 123,416.64 is: 185,124.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,959.75 : 658,439.64 = 123,416.64 : x
  2. Step 2: Convert to fraction form
    438,959.75/658,439.64 = 123,416.64/x
  3. Step 3: Cross multiply
    438,959.75x = 658,439.64 × 123,416.64
  4. Step 4: Simplify right side
    438,959.75x = 81,262,408,011.61
  5. Step 5: Solve for x
    x = 81,262,408,011.61/438,959.75
  6. Step 6: Final answer
    x = 185,124.97

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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.