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Finding the Fourth Proportional to 706.28, 974.72 and 395.80

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Solution

The fourth proportional to 706.28, 974.72 and 395.80 is: 546.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.28 : 974.72 = 395.80 : x
  2. Step 2: Convert to fraction form
    706.28/974.72 = 395.80/x
  3. Step 3: Cross multiply
    706.28x = 974.72 × 395.80
  4. Step 4: Simplify right side
    706.28x = 385,794.18
  5. Step 5: Solve for x
    x = 385,794.18/706.28
  6. Step 6: Final answer
    x = 546.23

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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.