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Finding the Fourth Proportional to 3,479.68, 5,220.24 and 1,531.72

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Solution

The fourth proportional to 3,479.68, 5,220.24 and 1,531.72 is: 2,297.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.68 : 5,220.24 = 1,531.72 : x
  2. Step 2: Convert to fraction form
    3,479.68/5,220.24 = 1,531.72/x
  3. Step 3: Cross multiply
    3,479.68x = 5,220.24 × 1,531.72
  4. Step 4: Simplify right side
    3,479.68x = 7,995,946.01
  5. Step 5: Solve for x
    x = 7,995,946.01/3,479.68
  6. Step 6: Final answer
    x = 2,297.90

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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.