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Finding the Fourth Proportional to 1,539.66, 2,124.10 and 876.42

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Solution

The fourth proportional to 1,539.66, 2,124.10 and 876.42 is: 1,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.66 : 2,124.10 = 876.42 : x
  2. Step 2: Convert to fraction form
    1,539.66/2,124.10 = 876.42/x
  3. Step 3: Cross multiply
    1,539.66x = 2,124.10 × 876.42
  4. Step 4: Simplify right side
    1,539.66x = 1,861,603.72
  5. Step 5: Solve for x
    x = 1,861,603.72/1,539.66
  6. Step 6: Final answer
    x = 1,209.10

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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.