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Finding the Fourth Proportional to 1,446.47, 2,172.62 and 862.61

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Solution

The fourth proportional to 1,446.47, 2,172.62 and 862.61 is: 1,295.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.47 : 2,172.62 = 862.61 : x
  2. Step 2: Convert to fraction form
    1,446.47/2,172.62 = 862.61/x
  3. Step 3: Cross multiply
    1,446.47x = 2,172.62 × 862.61
  4. Step 4: Simplify right side
    1,446.47x = 1,874,115.03
  5. Step 5: Solve for x
    x = 1,874,115.03/1,446.47
  6. Step 6: Final answer
    x = 1,295.65

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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.