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Finding the Fourth Proportional to 602.70, 831.24 and 405.96

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Solution

The fourth proportional to 602.70, 831.24 and 405.96 is: 559.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.70 : 831.24 = 405.96 : x
  2. Step 2: Convert to fraction form
    602.70/831.24 = 405.96/x
  3. Step 3: Cross multiply
    602.70x = 831.24 × 405.96
  4. Step 4: Simplify right side
    602.70x = 337,450.19
  5. Step 5: Solve for x
    x = 337,450.19/602.70
  6. Step 6: Final answer
    x = 559.90

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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.