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Finding the Fourth Proportional to 674.49, 931.08 and 425.94

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Solution

The fourth proportional to 674.49, 931.08 and 425.94 is: 587.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.49 : 931.08 = 425.94 : x
  2. Step 2: Convert to fraction form
    674.49/931.08 = 425.94/x
  3. Step 3: Cross multiply
    674.49x = 931.08 × 425.94
  4. Step 4: Simplify right side
    674.49x = 396,582.09
  5. Step 5: Solve for x
    x = 396,582.09/674.49
  6. Step 6: Final answer
    x = 587.98

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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.