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Finding the Fourth Proportional to 626.32, 939.16 and 215.33

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Solution

The fourth proportional to 626.32, 939.16 and 215.33 is: 322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.32 : 939.16 = 215.33 : x
  2. Step 2: Convert to fraction form
    626.32/939.16 = 215.33/x
  3. Step 3: Cross multiply
    626.32x = 939.16 × 215.33
  4. Step 4: Simplify right side
    626.32x = 202,223.55
  5. Step 5: Solve for x
    x = 202,223.55/626.32
  6. Step 6: Final answer
    x = 322.88

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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.