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Finding the Fourth Proportional to 5,325.52, 7,987.18 and 1,429

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Solution

The fourth proportional to 5,325.52, 7,987.18 and 1,429 is: 2,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,325.52 : 7,987.18 = 1,429 : x
  2. Step 2: Convert to fraction form
    5,325.52/7,987.18 = 1,429/x
  3. Step 3: Cross multiply
    5,325.52x = 7,987.18 × 1,429
  4. Step 4: Simplify right side
    5,325.52x = 11,413,680.22
  5. Step 5: Solve for x
    x = 11,413,680.22/5,325.52
  6. Step 6: Final answer
    x = 2,143.20

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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.