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Finding the Fourth Proportional to 704.90, 1,057.28 and 242.66

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Solution

The fourth proportional to 704.90, 1,057.28 and 242.66 is: 363.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.90 : 1,057.28 = 242.66 : x
  2. Step 2: Convert to fraction form
    704.90/1,057.28 = 242.66/x
  3. Step 3: Cross multiply
    704.90x = 1,057.28 × 242.66
  4. Step 4: Simplify right side
    704.90x = 256,560.99
  5. Step 5: Solve for x
    x = 256,560.99/704.90
  6. Step 6: Final answer
    x = 363.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.