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Finding the Fourth Proportional to 301.98, 417.72 and 252.78

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Solution

The fourth proportional to 301.98, 417.72 and 252.78 is: 349.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.98 : 417.72 = 252.78 : x
  2. Step 2: Convert to fraction form
    301.98/417.72 = 252.78/x
  3. Step 3: Cross multiply
    301.98x = 417.72 × 252.78
  4. Step 4: Simplify right side
    301.98x = 105,591.26
  5. Step 5: Solve for x
    x = 105,591.26/301.98
  6. Step 6: Final answer
    x = 349.66

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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.