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Finding the Fourth Proportional to 1,821.62, 2,732.62 and 667.10

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Solution

The fourth proportional to 1,821.62, 2,732.62 and 667.10 is: 1,000.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.62 : 2,732.62 = 667.10 : x
  2. Step 2: Convert to fraction form
    1,821.62/2,732.62 = 667.10/x
  3. Step 3: Cross multiply
    1,821.62x = 2,732.62 × 667.10
  4. Step 4: Simplify right side
    1,821.62x = 1,822,930.80
  5. Step 5: Solve for x
    x = 1,822,930.80/1,821.62
  6. Step 6: Final answer
    x = 1,000.72

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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.