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Finding the Fourth Proportional to 1,328.49, 1,992.07 and 495.27

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Solution

The fourth proportional to 1,328.49, 1,992.07 and 495.27 is: 742.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.49 : 1,992.07 = 495.27 : x
  2. Step 2: Convert to fraction form
    1,328.49/1,992.07 = 495.27/x
  3. Step 3: Cross multiply
    1,328.49x = 1,992.07 × 495.27
  4. Step 4: Simplify right side
    1,328.49x = 986,613.13
  5. Step 5: Solve for x
    x = 986,613.13/1,328.49
  6. Step 6: Final answer
    x = 742.66

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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.