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Finding the Fourth Proportional to 332.51, 459.25 and 221.78

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Solution

The fourth proportional to 332.51, 459.25 and 221.78 is: 306.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    332.51 : 459.25 = 221.78 : x
  2. Step 2: Convert to fraction form
    332.51/459.25 = 221.78/x
  3. Step 3: Cross multiply
    332.51x = 459.25 × 221.78
  4. Step 4: Simplify right side
    332.51x = 101,853.06
  5. Step 5: Solve for x
    x = 101,853.06/332.51
  6. Step 6: Final answer
    x = 306.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.