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Finding the Fourth Proportional to 1,232.12, 1,848.17 and 869.90

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Solution

The fourth proportional to 1,232.12, 1,848.17 and 869.90 is: 1,304.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.12 : 1,848.17 = 869.90 : x
  2. Step 2: Convert to fraction form
    1,232.12/1,848.17 = 869.90/x
  3. Step 3: Cross multiply
    1,232.12x = 1,848.17 × 869.90
  4. Step 4: Simplify right side
    1,232.12x = 1,607,716.02
  5. Step 5: Solve for x
    x = 1,607,716.02/1,232.12
  6. Step 6: Final answer
    x = 1,304.83

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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.