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Finding the Fourth Proportional to 669.44, 924.96 and 553.28

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Solution

The fourth proportional to 669.44, 924.96 and 553.28 is: 764.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.44 : 924.96 = 553.28 : x
  2. Step 2: Convert to fraction form
    669.44/924.96 = 553.28/x
  3. Step 3: Cross multiply
    669.44x = 924.96 × 553.28
  4. Step 4: Simplify right side
    669.44x = 511,761.87
  5. Step 5: Solve for x
    x = 511,761.87/669.44
  6. Step 6: Final answer
    x = 764.46

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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.