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Finding the Fourth Proportional to 688, 1,032.16 and 495.28

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Solution

The fourth proportional to 688, 1,032.16 and 495.28 is: 743.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    688 : 1,032.16 = 495.28 : x
  2. Step 2: Convert to fraction form
    688/1,032.16 = 495.28/x
  3. Step 3: Cross multiply
    688x = 1,032.16 × 495.28
  4. Step 4: Simplify right side
    688x = 511,208.20
  5. Step 5: Solve for x
    x = 511,208.20/688
  6. Step 6: Final answer
    x = 743.04

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.