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Finding the Fourth Proportional to 691.06, 953.75 and 396.27

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Solution

The fourth proportional to 691.06, 953.75 and 396.27 is: 546.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.06 : 953.75 = 396.27 : x
  2. Step 2: Convert to fraction form
    691.06/953.75 = 396.27/x
  3. Step 3: Cross multiply
    691.06x = 953.75 × 396.27
  4. Step 4: Simplify right side
    691.06x = 377,940.13
  5. Step 5: Solve for x
    x = 377,940.13/691.06
  6. Step 6: Final answer
    x = 546.90

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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.