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Finding the Fourth Proportional to 1,317.67, 1,976.16 and 495.49

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Solution

The fourth proportional to 1,317.67, 1,976.16 and 495.49 is: 743.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.67 : 1,976.16 = 495.49 : x
  2. Step 2: Convert to fraction form
    1,317.67/1,976.16 = 495.49/x
  3. Step 3: Cross multiply
    1,317.67x = 1,976.16 × 495.49
  4. Step 4: Simplify right side
    1,317.67x = 979,171.61
  5. Step 5: Solve for x
    x = 979,171.61/1,317.67
  6. Step 6: Final answer
    x = 743.11

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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.