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Finding the Fourth Proportional to 704.62, 1,056.12 and 379.54

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Solution

The fourth proportional to 704.62, 1,056.12 and 379.54 is: 568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.62 : 1,056.12 = 379.54 : x
  2. Step 2: Convert to fraction form
    704.62/1,056.12 = 379.54/x
  3. Step 3: Cross multiply
    704.62x = 1,056.12 × 379.54
  4. Step 4: Simplify right side
    704.62x = 400,839.78
  5. Step 5: Solve for x
    x = 400,839.78/704.62
  6. Step 6: Final answer
    x = 568.87

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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.