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Finding the Fourth Proportional to 663.72, 915.48 and 608.64

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Solution

The fourth proportional to 663.72, 915.48 and 608.64 is: 839.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.72 : 915.48 = 608.64 : x
  2. Step 2: Convert to fraction form
    663.72/915.48 = 608.64/x
  3. Step 3: Cross multiply
    663.72x = 915.48 × 608.64
  4. Step 4: Simplify right side
    663.72x = 557,197.75
  5. Step 5: Solve for x
    x = 557,197.75/663.72
  6. Step 6: Final answer
    x = 839.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.