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Finding the Fourth Proportional to 1,866.55, 2,575.84 and 1,069.88

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Solution

The fourth proportional to 1,866.55, 2,575.84 and 1,069.88 is: 1,476.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.55 : 2,575.84 = 1,069.88 : x
  2. Step 2: Convert to fraction form
    1,866.55/2,575.84 = 1,069.88/x
  3. Step 3: Cross multiply
    1,866.55x = 2,575.84 × 1,069.88
  4. Step 4: Simplify right side
    1,866.55x = 2,755,839.70
  5. Step 5: Solve for x
    x = 2,755,839.70/1,866.55
  6. Step 6: Final answer
    x = 1,476.43

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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.