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Finding the Fourth Proportional to 220.77, 332.72 and 207.09

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Solution

The fourth proportional to 220.77, 332.72 and 207.09 is: 312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.77 : 332.72 = 207.09 : x
  2. Step 2: Convert to fraction form
    220.77/332.72 = 207.09/x
  3. Step 3: Cross multiply
    220.77x = 332.72 × 207.09
  4. Step 4: Simplify right side
    220.77x = 68,901.95
  5. Step 5: Solve for x
    x = 68,901.95/220.77
  6. Step 6: Final answer
    x = 312.10

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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.