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Finding the Fourth Proportional to 944.56, 1,302.08 and 663.92

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Solution

The fourth proportional to 944.56, 1,302.08 and 663.92 is: 915.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.56 : 1,302.08 = 663.92 : x
  2. Step 2: Convert to fraction form
    944.56/1,302.08 = 663.92/x
  3. Step 3: Cross multiply
    944.56x = 1,302.08 × 663.92
  4. Step 4: Simplify right side
    944.56x = 864,476.95
  5. Step 5: Solve for x
    x = 864,476.95/944.56
  6. Step 6: Final answer
    x = 915.22

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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.