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Finding the Fourth Proportional to 242.60, 365.92 and 212.49

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Solution

The fourth proportional to 242.60, 365.92 and 212.49 is: 320.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.60 : 365.92 = 212.49 : x
  2. Step 2: Convert to fraction form
    242.60/365.92 = 212.49/x
  3. Step 3: Cross multiply
    242.60x = 365.92 × 212.49
  4. Step 4: Simplify right side
    242.60x = 77,753.81
  5. Step 5: Solve for x
    x = 77,753.81/242.60
  6. Step 6: Final answer
    x = 320.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.