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Finding the Fourth Proportional to 706.68, 975.20 and 391.94

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Solution

The fourth proportional to 706.68, 975.20 and 391.94 is: 540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.68 : 975.20 = 391.94 : x
  2. Step 2: Convert to fraction form
    706.68/975.20 = 391.94/x
  3. Step 3: Cross multiply
    706.68x = 975.20 × 391.94
  4. Step 4: Simplify right side
    706.68x = 382,219.89
  5. Step 5: Solve for x
    x = 382,219.89/706.68
  6. Step 6: Final answer
    x = 540.87

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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.