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Finding the Fourth Proportional to 242.02, 363.05 and 145.18

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Solution

The fourth proportional to 242.02, 363.05 and 145.18 is: 217.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.02 : 363.05 = 145.18 : x
  2. Step 2: Convert to fraction form
    242.02/363.05 = 145.18/x
  3. Step 3: Cross multiply
    242.02x = 363.05 × 145.18
  4. Step 4: Simplify right side
    242.02x = 52,707.87
  5. Step 5: Solve for x
    x = 52,707.87/242.02
  6. Step 6: Final answer
    x = 217.78

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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.