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Finding the Fourth Proportional to 1,144.90, 1,717.34 and 323.17

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Solution

The fourth proportional to 1,144.90, 1,717.34 and 323.17 is: 484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.90 : 1,717.34 = 323.17 : x
  2. Step 2: Convert to fraction form
    1,144.90/1,717.34 = 323.17/x
  3. Step 3: Cross multiply
    1,144.90x = 1,717.34 × 323.17
  4. Step 4: Simplify right side
    1,144.90x = 554,989.28
  5. Step 5: Solve for x
    x = 554,989.28/1,144.90
  6. Step 6: Final answer
    x = 484.75

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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.