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Finding the Fourth Proportional to 485,474.85, 728,211.23 and 130,488.87

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Solution

The fourth proportional to 485,474.85, 728,211.23 and 130,488.87 is: 195,733.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,474.85 : 728,211.23 = 130,488.87 : x
  2. Step 2: Convert to fraction form
    485,474.85/728,211.23 = 130,488.87/x
  3. Step 3: Cross multiply
    485,474.85x = 728,211.23 × 130,488.87
  4. Step 4: Simplify right side
    485,474.85x = 95,023,460,524.01
  5. Step 5: Solve for x
    x = 95,023,460,524.01/485,474.85
  6. Step 6: Final answer
    x = 195,733.02

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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.