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Finding the Fourth Proportional to 706.26, 974.62 and 391.55

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Solution

The fourth proportional to 706.26, 974.62 and 391.55 is: 540.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.26 : 974.62 = 391.55 : x
  2. Step 2: Convert to fraction form
    706.26/974.62 = 391.55/x
  3. Step 3: Cross multiply
    706.26x = 974.62 × 391.55
  4. Step 4: Simplify right side
    706.26x = 381,612.46
  5. Step 5: Solve for x
    x = 381,612.46/706.26
  6. Step 6: Final answer
    x = 540.33

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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.