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Finding the Fourth Proportional to 242.57, 363.86 and 71.57

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Solution

The fourth proportional to 242.57, 363.86 and 71.57 is: 107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.57 : 363.86 = 71.57 : x
  2. Step 2: Convert to fraction form
    242.57/363.86 = 71.57/x
  3. Step 3: Cross multiply
    242.57x = 363.86 × 71.57
  4. Step 4: Simplify right side
    242.57x = 26,039.28
  5. Step 5: Solve for x
    x = 26,039.28/242.57
  6. Step 6: Final answer
    x = 107.35

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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.