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Finding the Fourth Proportional to 247.86, 373.61 and 221.13

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Solution

The fourth proportional to 247.86, 373.61 and 221.13 is: 333.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.86 : 373.61 = 221.13 : x
  2. Step 2: Convert to fraction form
    247.86/373.61 = 221.13/x
  3. Step 3: Cross multiply
    247.86x = 373.61 × 221.13
  4. Step 4: Simplify right side
    247.86x = 82,616.93
  5. Step 5: Solve for x
    x = 82,616.93/247.86
  6. Step 6: Final answer
    x = 333.32

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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.