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Finding the Fourth Proportional to 5,128.60, 7,682.10 and 4,264.60

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Solution

The fourth proportional to 5,128.60, 7,682.10 and 4,264.60 is: 6,387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.60 : 7,682.10 = 4,264.60 : x
  2. Step 2: Convert to fraction form
    5,128.60/7,682.10 = 4,264.60/x
  3. Step 3: Cross multiply
    5,128.60x = 7,682.10 × 4,264.60
  4. Step 4: Simplify right side
    5,128.60x = 32,761,083.66
  5. Step 5: Solve for x
    x = 32,761,083.66/5,128.60
  6. Step 6: Final answer
    x = 6,387.92

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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.