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Finding the Fourth Proportional to 453.66, 626.50 and 391.14

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Solution

The fourth proportional to 453.66, 626.50 and 391.14 is: 540.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.66 : 626.50 = 391.14 : x
  2. Step 2: Convert to fraction form
    453.66/626.50 = 391.14/x
  3. Step 3: Cross multiply
    453.66x = 626.50 × 391.14
  4. Step 4: Simplify right side
    453.66x = 245,049.21
  5. Step 5: Solve for x
    x = 245,049.21/453.66
  6. Step 6: Final answer
    x = 540.16

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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.