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Finding the Fourth Proportional to 3,681, 5,522.31 and 1,489.86

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Solution

The fourth proportional to 3,681, 5,522.31 and 1,489.86 is: 2,235.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,681 : 5,522.31 = 1,489.86 : x
  2. Step 2: Convert to fraction form
    3,681/5,522.31 = 1,489.86/x
  3. Step 3: Cross multiply
    3,681x = 5,522.31 × 1,489.86
  4. Step 4: Simplify right side
    3,681x = 8,227,468.78
  5. Step 5: Solve for x
    x = 8,227,468.78/3,681
  6. Step 6: Final answer
    x = 2,235.12

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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.