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Finding the Fourth Proportional to 704.58, 1,057.02 and 314.43

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Solution

The fourth proportional to 704.58, 1,057.02 and 314.43 is: 471.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.58 : 1,057.02 = 314.43 : x
  2. Step 2: Convert to fraction form
    704.58/1,057.02 = 314.43/x
  3. Step 3: Cross multiply
    704.58x = 1,057.02 × 314.43
  4. Step 4: Simplify right side
    704.58x = 332,358.80
  5. Step 5: Solve for x
    x = 332,358.80/704.58
  6. Step 6: Final answer
    x = 471.71

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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.