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Finding the Fourth Proportional to 485,081.20, 727,621.80 and 408,098.80

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Solution

The fourth proportional to 485,081.20, 727,621.80 and 408,098.80 is: 612,148.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,081.20 : 727,621.80 = 408,098.80 : x
  2. Step 2: Convert to fraction form
    485,081.20/727,621.80 = 408,098.80/x
  3. Step 3: Cross multiply
    485,081.20x = 727,621.80 × 408,098.80
  4. Step 4: Simplify right side
    485,081.20x = 296,941,583,433.84
  5. Step 5: Solve for x
    x = 296,941,583,433.84/485,081.20
  6. Step 6: Final answer
    x = 612,148.20

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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.