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Finding the Fourth Proportional to 1,143.90, 1,716.66 and 495.09

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Solution

The fourth proportional to 1,143.90, 1,716.66 and 495.09 is: 742.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.90 : 1,716.66 = 495.09 : x
  2. Step 2: Convert to fraction form
    1,143.90/1,716.66 = 495.09/x
  3. Step 3: Cross multiply
    1,143.90x = 1,716.66 × 495.09
  4. Step 4: Simplify right side
    1,143.90x = 849,901.20
  5. Step 5: Solve for x
    x = 849,901.20/1,143.90
  6. Step 6: Final answer
    x = 742.99

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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.