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Finding the Fourth Proportional to 242.24, 332.30 and 221.74

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Solution

The fourth proportional to 242.24, 332.30 and 221.74 is: 304.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.24 : 332.30 = 221.74 : x
  2. Step 2: Convert to fraction form
    242.24/332.30 = 221.74/x
  3. Step 3: Cross multiply
    242.24x = 332.30 × 221.74
  4. Step 4: Simplify right side
    242.24x = 73,683.93
  5. Step 5: Solve for x
    x = 73,683.93/242.24
  6. Step 6: Final answer
    x = 304.18

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.