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Finding the Fourth Proportional to 485,476.03, 728,212.98 and 130,490.05

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Solution

The fourth proportional to 485,476.03, 728,212.98 and 130,490.05 is: 195,734.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,476.03 : 728,212.98 = 130,490.05 : x
  2. Step 2: Convert to fraction form
    485,476.03/728,212.98 = 130,490.05/x
  3. Step 3: Cross multiply
    485,476.03x = 728,212.98 × 130,490.05
  4. Step 4: Simplify right side
    485,476.03x = 95,024,548,170.85
  5. Step 5: Solve for x
    x = 95,024,548,170.85/485,476.03
  6. Step 6: Final answer
    x = 195,734.79

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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.