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Finding the Fourth Proportional to 706.20, 974.54 and 395.70

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Solution

The fourth proportional to 706.20, 974.54 and 395.70 is: 546.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.20 : 974.54 = 395.70 : x
  2. Step 2: Convert to fraction form
    706.20/974.54 = 395.70/x
  3. Step 3: Cross multiply
    706.20x = 974.54 × 395.70
  4. Step 4: Simplify right side
    706.20x = 385,625.48
  5. Step 5: Solve for x
    x = 385,625.48/706.20
  6. Step 6: Final answer
    x = 546.06

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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.