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Finding the Fourth Proportional to 1,153.10, 1,729.88 and 422.59

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Solution

The fourth proportional to 1,153.10, 1,729.88 and 422.59 is: 633.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.10 : 1,729.88 = 422.59 : x
  2. Step 2: Convert to fraction form
    1,153.10/1,729.88 = 422.59/x
  3. Step 3: Cross multiply
    1,153.10x = 1,729.88 × 422.59
  4. Step 4: Simplify right side
    1,153.10x = 731,029.99
  5. Step 5: Solve for x
    x = 731,029.99/1,153.10
  6. Step 6: Final answer
    x = 633.97

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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.