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Finding the Fourth Proportional to 815.44, 1,125.04 and 484

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Solution

The fourth proportional to 815.44, 1,125.04 and 484 is: 667.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.44 : 1,125.04 = 484 : x
  2. Step 2: Convert to fraction form
    815.44/1,125.04 = 484/x
  3. Step 3: Cross multiply
    815.44x = 1,125.04 × 484
  4. Step 4: Simplify right side
    815.44x = 544,519.36
  5. Step 5: Solve for x
    x = 544,519.36/815.44
  6. Step 6: Final answer
    x = 667.76

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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.