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Finding the Fourth Proportional to 357.79, 534.05 and 331.74

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Solution

The fourth proportional to 357.79, 534.05 and 331.74 is: 495.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.79 : 534.05 = 331.74 : x
  2. Step 2: Convert to fraction form
    357.79/534.05 = 331.74/x
  3. Step 3: Cross multiply
    357.79x = 534.05 × 331.74
  4. Step 4: Simplify right side
    357.79x = 177,165.75
  5. Step 5: Solve for x
    x = 177,165.75/357.79
  6. Step 6: Final answer
    x = 495.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.