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Finding the Fourth Proportional to 706.18, 974.53 and 391.46

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Solution

The fourth proportional to 706.18, 974.53 and 391.46 is: 540.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.18 : 974.53 = 391.46 : x
  2. Step 2: Convert to fraction form
    706.18/974.53 = 391.46/x
  3. Step 3: Cross multiply
    706.18x = 974.53 × 391.46
  4. Step 4: Simplify right side
    706.18x = 381,489.51
  5. Step 5: Solve for x
    x = 381,489.51/706.18
  6. Step 6: Final answer
    x = 540.22

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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.