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Finding the Fourth Proportional to 5,130.88, 7,696.32 and 1,432.80

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Solution

The fourth proportional to 5,130.88, 7,696.32 and 1,432.80 is: 2,149.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.88 : 7,696.32 = 1,432.80 : x
  2. Step 2: Convert to fraction form
    5,130.88/7,696.32 = 1,432.80/x
  3. Step 3: Cross multiply
    5,130.88x = 7,696.32 × 1,432.80
  4. Step 4: Simplify right side
    5,130.88x = 11,027,287.30
  5. Step 5: Solve for x
    x = 11,027,287.30/5,130.88
  6. Step 6: Final answer
    x = 2,149.20

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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.