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Finding the Fourth Proportional to 675.38, 931.53 and 426.74

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Solution

The fourth proportional to 675.38, 931.53 and 426.74 is: 588.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.38 : 931.53 = 426.74 : x
  2. Step 2: Convert to fraction form
    675.38/931.53 = 426.74/x
  3. Step 3: Cross multiply
    675.38x = 931.53 × 426.74
  4. Step 4: Simplify right side
    675.38x = 397,521.11
  5. Step 5: Solve for x
    x = 397,521.11/675.38
  6. Step 6: Final answer
    x = 588.59

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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.