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Finding the Fourth Proportional to 2,165.53, 3,248.01 and 1,124.95

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Solution

The fourth proportional to 2,165.53, 3,248.01 and 1,124.95 is: 1,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.53 : 3,248.01 = 1,124.95 : x
  2. Step 2: Convert to fraction form
    2,165.53/3,248.01 = 1,124.95/x
  3. Step 3: Cross multiply
    2,165.53x = 3,248.01 × 1,124.95
  4. Step 4: Simplify right side
    2,165.53x = 3,653,848.85
  5. Step 5: Solve for x
    x = 3,653,848.85/2,165.53
  6. Step 6: Final answer
    x = 1,687.28

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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.