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Finding the Fourth Proportional to 626.18, 938.48 and 318.11

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Solution

The fourth proportional to 626.18, 938.48 and 318.11 is: 476.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.18 : 938.48 = 318.11 : x
  2. Step 2: Convert to fraction form
    626.18/938.48 = 318.11/x
  3. Step 3: Cross multiply
    626.18x = 938.48 × 318.11
  4. Step 4: Simplify right side
    626.18x = 298,533.59
  5. Step 5: Solve for x
    x = 298,533.59/626.18
  6. Step 6: Final answer
    x = 476.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.