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Finding the Fourth Proportional to 453.80, 625.70 and 306.76

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Solution

The fourth proportional to 453.80, 625.70 and 306.76 is: 422.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.80 : 625.70 = 306.76 : x
  2. Step 2: Convert to fraction form
    453.80/625.70 = 306.76/x
  3. Step 3: Cross multiply
    453.80x = 625.70 × 306.76
  4. Step 4: Simplify right side
    453.80x = 191,939.73
  5. Step 5: Solve for x
    x = 191,939.73/453.80
  6. Step 6: Final answer
    x = 422.96

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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.