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Finding the Fourth Proportional to 704.62, 971.80 and 538.57

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Solution

The fourth proportional to 704.62, 971.80 and 538.57 is: 742.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.62 : 971.80 = 538.57 : x
  2. Step 2: Convert to fraction form
    704.62/971.80 = 538.57/x
  3. Step 3: Cross multiply
    704.62x = 971.80 × 538.57
  4. Step 4: Simplify right side
    704.62x = 523,382.33
  5. Step 5: Solve for x
    x = 523,382.33/704.62
  6. Step 6: Final answer
    x = 742.79

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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.