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Finding the Fourth Proportional to 691.15, 953.74 and 411.41

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Solution

The fourth proportional to 691.15, 953.74 and 411.41 is: 567.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.15 : 953.74 = 411.41 : x
  2. Step 2: Convert to fraction form
    691.15/953.74 = 411.41/x
  3. Step 3: Cross multiply
    691.15x = 953.74 × 411.41
  4. Step 4: Simplify right side
    691.15x = 392,373.92
  5. Step 5: Solve for x
    x = 392,373.92/691.15
  6. Step 6: Final answer
    x = 567.71

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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.