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Finding the Fourth Proportional to 1,165.31, 1,747.63 and 343.57

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Solution

The fourth proportional to 1,165.31, 1,747.63 and 343.57 is: 515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.31 : 1,747.63 = 343.57 : x
  2. Step 2: Convert to fraction form
    1,165.31/1,747.63 = 343.57/x
  3. Step 3: Cross multiply
    1,165.31x = 1,747.63 × 343.57
  4. Step 4: Simplify right side
    1,165.31x = 600,428.01
  5. Step 5: Solve for x
    x = 600,428.01/1,165.31
  6. Step 6: Final answer
    x = 515.25

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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.