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Finding the Fourth Proportional to 1,587.62, 2,381.76 and 547.58

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Solution

The fourth proportional to 1,587.62, 2,381.76 and 547.58 is: 821.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.62 : 2,381.76 = 547.58 : x
  2. Step 2: Convert to fraction form
    1,587.62/2,381.76 = 547.58/x
  3. Step 3: Cross multiply
    1,587.62x = 2,381.76 × 547.58
  4. Step 4: Simplify right side
    1,587.62x = 1,304,204.14
  5. Step 5: Solve for x
    x = 1,304,204.14/1,587.62
  6. Step 6: Final answer
    x = 821.48

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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.