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Finding the Fourth Proportional to 1,539.32, 2,124.63 and 876.53

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Solution

The fourth proportional to 1,539.32, 2,124.63 and 876.53 is: 1,209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.32 : 2,124.63 = 876.53 : x
  2. Step 2: Convert to fraction form
    1,539.32/2,124.63 = 876.53/x
  3. Step 3: Cross multiply
    1,539.32x = 2,124.63 × 876.53
  4. Step 4: Simplify right side
    1,539.32x = 1,862,301.93
  5. Step 5: Solve for x
    x = 1,862,301.93/1,539.32
  6. Step 6: Final answer
    x = 1,209.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.