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Finding the Fourth Proportional to 691.44, 954.33 and 425.86

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Solution

The fourth proportional to 691.44, 954.33 and 425.86 is: 587.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.44 : 954.33 = 425.86 : x
  2. Step 2: Convert to fraction form
    691.44/954.33 = 425.86/x
  3. Step 3: Cross multiply
    691.44x = 954.33 × 425.86
  4. Step 4: Simplify right side
    691.44x = 406,409.39
  5. Step 5: Solve for x
    x = 406,409.39/691.44
  6. Step 6: Final answer
    x = 587.78

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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.