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Finding the Fourth Proportional to 453.46, 626.71 and 391.27

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Solution

The fourth proportional to 453.46, 626.71 and 391.27 is: 540.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.46 : 626.71 = 391.27 : x
  2. Step 2: Convert to fraction form
    453.46/626.71 = 391.27/x
  3. Step 3: Cross multiply
    453.46x = 626.71 × 391.27
  4. Step 4: Simplify right side
    453.46x = 245,212.40
  5. Step 5: Solve for x
    x = 245,212.40/453.46
  6. Step 6: Final answer
    x = 540.76

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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.