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Finding the Fourth Proportional to 485,341.32, 728,013.84 and 148,380.66

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Solution

The fourth proportional to 485,341.32, 728,013.84 and 148,380.66 is: 222,571.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,341.32 : 728,013.84 = 148,380.66 : x
  2. Step 2: Convert to fraction form
    485,341.32/728,013.84 = 148,380.66/x
  3. Step 3: Cross multiply
    485,341.32x = 728,013.84 × 148,380.66
  4. Step 4: Simplify right side
    485,341.32x = 108,023,174,068.33
  5. Step 5: Solve for x
    x = 108,023,174,068.33/485,341.32
  6. Step 6: Final answer
    x = 222,571.56

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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.