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Finding the Fourth Proportional to 1,153.11, 1,729.47 and 331.19

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Solution

The fourth proportional to 1,153.11, 1,729.47 and 331.19 is: 496.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.11 : 1,729.47 = 331.19 : x
  2. Step 2: Convert to fraction form
    1,153.11/1,729.47 = 331.19/x
  3. Step 3: Cross multiply
    1,153.11x = 1,729.47 × 331.19
  4. Step 4: Simplify right side
    1,153.11x = 572,788.73
  5. Step 5: Solve for x
    x = 572,788.73/1,153.11
  6. Step 6: Final answer
    x = 496.74

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Double scale
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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.