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Finding the Fourth Proportional to 485,740.20, 728,599.35 and 130,758.54

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Solution

The fourth proportional to 485,740.20, 728,599.35 and 130,758.54 is: 196,134.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,740.20 : 728,599.35 = 130,758.54 : x
  2. Step 2: Convert to fraction form
    485,740.20/728,599.35 = 130,758.54/x
  3. Step 3: Cross multiply
    485,740.20x = 728,599.35 × 130,758.54
  4. Step 4: Simplify right side
    485,740.20x = 95,270,587,250.95
  5. Step 5: Solve for x
    x = 95,270,587,250.95/485,740.20
  6. Step 6: Final answer
    x = 196,134.86

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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.