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Finding the Fourth Proportional to 706.61, 975.17 and 396.11

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Solution

The fourth proportional to 706.61, 975.17 and 396.11 is: 546.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.61 : 975.17 = 396.11 : x
  2. Step 2: Convert to fraction form
    706.61/975.17 = 396.11/x
  3. Step 3: Cross multiply
    706.61x = 975.17 × 396.11
  4. Step 4: Simplify right side
    706.61x = 386,274.59
  5. Step 5: Solve for x
    x = 386,274.59/706.61
  6. Step 6: Final answer
    x = 546.66

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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.