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Finding the Fourth Proportional to 220.68, 330.93 and 76.37

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Solution

The fourth proportional to 220.68, 330.93 and 76.37 is: 114.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.68 : 330.93 = 76.37 : x
  2. Step 2: Convert to fraction form
    220.68/330.93 = 76.37/x
  3. Step 3: Cross multiply
    220.68x = 330.93 × 76.37
  4. Step 4: Simplify right side
    220.68x = 25,271.47
  5. Step 5: Solve for x
    x = 25,271.47/220.68
  6. Step 6: Final answer
    x = 114.52

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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.