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Finding the Fourth Proportional to 485,620.49, 728,306.49 and 143,984.04

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Solution

The fourth proportional to 485,620.49, 728,306.49 and 143,984.04 is: 215,939.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,620.49 : 728,306.49 = 143,984.04 : x
  2. Step 2: Convert to fraction form
    485,620.49/728,306.49 = 143,984.04/x
  3. Step 3: Cross multiply
    485,620.49x = 728,306.49 × 143,984.04
  4. Step 4: Simplify right side
    485,620.49x = 104,864,510,788.42
  5. Step 5: Solve for x
    x = 104,864,510,788.42/485,620.49
  6. Step 6: Final answer
    x = 215,939.22

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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.