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Finding the Fourth Proportional to 423.24, 634.95 and 240.78

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Solution

The fourth proportional to 423.24, 634.95 and 240.78 is: 361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.24 : 634.95 = 240.78 : x
  2. Step 2: Convert to fraction form
    423.24/634.95 = 240.78/x
  3. Step 3: Cross multiply
    423.24x = 634.95 × 240.78
  4. Step 4: Simplify right side
    423.24x = 152,883.26
  5. Step 5: Solve for x
    x = 152,883.26/423.24
  6. Step 6: Final answer
    x = 361.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.