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Finding the Fourth Proportional to 626.31, 939.69 and 318.24

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Solution

The fourth proportional to 626.31, 939.69 and 318.24 is: 477.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.31 : 939.69 = 318.24 : x
  2. Step 2: Convert to fraction form
    626.31/939.69 = 318.24/x
  3. Step 3: Cross multiply
    626.31x = 939.69 × 318.24
  4. Step 4: Simplify right side
    626.31x = 299,046.95
  5. Step 5: Solve for x
    x = 299,046.95/626.31
  6. Step 6: Final answer
    x = 477.47

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1.5x scale

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.