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Finding the Fourth Proportional to 485,361.92, 728,044.50 and 148,401.30

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Solution

The fourth proportional to 485,361.92, 728,044.50 and 148,401.30 is: 222,602.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,361.92 : 728,044.50 = 148,401.30 : x
  2. Step 2: Convert to fraction form
    485,361.92/728,044.50 = 148,401.30/x
  3. Step 3: Cross multiply
    485,361.92x = 728,044.50 × 148,401.30
  4. Step 4: Simplify right side
    485,361.92x = 108,042,750,257.85
  5. Step 5: Solve for x
    x = 108,042,750,257.85/485,361.92
  6. Step 6: Final answer
    x = 222,602.45

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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.