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Finding the Fourth Proportional to 674.93, 931.17 and 439.16

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Solution

The fourth proportional to 674.93, 931.17 and 439.16 is: 605.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.93 : 931.17 = 439.16 : x
  2. Step 2: Convert to fraction form
    674.93/931.17 = 439.16/x
  3. Step 3: Cross multiply
    674.93x = 931.17 × 439.16
  4. Step 4: Simplify right side
    674.93x = 408,934.95
  5. Step 5: Solve for x
    x = 408,934.95/674.93
  6. Step 6: Final answer
    x = 605.90

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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.