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Finding the Fourth Proportional to 626.12, 939.77 and 318.19

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Solution

The fourth proportional to 626.12, 939.77 and 318.19 is: 477.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.12 : 939.77 = 318.19 : x
  2. Step 2: Convert to fraction form
    626.12/939.77 = 318.19/x
  3. Step 3: Cross multiply
    626.12x = 939.77 × 318.19
  4. Step 4: Simplify right side
    626.12x = 299,026.17
  5. Step 5: Solve for x
    x = 299,026.17/626.12
  6. Step 6: Final answer
    x = 477.59

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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.