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Finding the Fourth Proportional to 602.28, 831.09 and 425.31

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Solution

The fourth proportional to 602.28, 831.09 and 425.31 is: 586.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.28 : 831.09 = 425.31 : x
  2. Step 2: Convert to fraction form
    602.28/831.09 = 425.31/x
  3. Step 3: Cross multiply
    602.28x = 831.09 × 425.31
  4. Step 4: Simplify right side
    602.28x = 353,466.73
  5. Step 5: Solve for x
    x = 353,466.73/602.28
  6. Step 6: Final answer
    x = 586.89

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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.