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Finding the Fourth Proportional to 1,729.41, 2,592.42 and 689.10

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Solution

The fourth proportional to 1,729.41, 2,592.42 and 689.10 is: 1,032.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.41 : 2,592.42 = 689.10 : x
  2. Step 2: Convert to fraction form
    1,729.41/2,592.42 = 689.10/x
  3. Step 3: Cross multiply
    1,729.41x = 2,592.42 × 689.10
  4. Step 4: Simplify right side
    1,729.41x = 1,786,436.62
  5. Step 5: Solve for x
    x = 1,786,436.62/1,729.41
  6. Step 6: Final answer
    x = 1,032.97

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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.