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Finding the Fourth Proportional to 268.10, 399.84 and 242.18

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Solution

The fourth proportional to 268.10, 399.84 and 242.18 is: 361.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.10 : 399.84 = 242.18 : x
  2. Step 2: Convert to fraction form
    268.10/399.84 = 242.18/x
  3. Step 3: Cross multiply
    268.10x = 399.84 × 242.18
  4. Step 4: Simplify right side
    268.10x = 96,833.25
  5. Step 5: Solve for x
    x = 96,833.25/268.10
  6. Step 6: Final answer
    x = 361.18

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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.