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Finding the Fourth Proportional to 485,575.20, 728,335.94 and 148,615.61

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Solution

The fourth proportional to 485,575.20, 728,335.94 and 148,615.61 is: 222,915.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,575.20 : 728,335.94 = 148,615.61 : x
  2. Step 2: Convert to fraction form
    485,575.20/728,335.94 = 148,615.61/x
  3. Step 3: Cross multiply
    485,575.20x = 728,335.94 × 148,615.61
  4. Step 4: Simplify right side
    485,575.20x = 108,242,085,623.27
  5. Step 5: Solve for x
    x = 108,242,085,623.27/485,575.20
  6. Step 6: Final answer
    x = 222,915.19

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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.