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Finding the Fourth Proportional to 663.21, 915.37 and 552.49

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Solution

The fourth proportional to 663.21, 915.37 and 552.49 is: 762.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.21 : 915.37 = 552.49 : x
  2. Step 2: Convert to fraction form
    663.21/915.37 = 552.49/x
  3. Step 3: Cross multiply
    663.21x = 915.37 × 552.49
  4. Step 4: Simplify right side
    663.21x = 505,729.10
  5. Step 5: Solve for x
    x = 505,729.10/663.21
  6. Step 6: Final answer
    x = 762.55

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Why These Related Problems?

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