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Finding the Fourth Proportional to 242.75, 334.99 and 143.15

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Solution

The fourth proportional to 242.75, 334.99 and 143.15 is: 197.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.75 : 334.99 = 143.15 : x
  2. Step 2: Convert to fraction form
    242.75/334.99 = 143.15/x
  3. Step 3: Cross multiply
    242.75x = 334.99 × 143.15
  4. Step 4: Simplify right side
    242.75x = 47,953.82
  5. Step 5: Solve for x
    x = 47,953.82/242.75
  6. Step 6: Final answer
    x = 197.54

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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.