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Finding the Fourth Proportional to 626.41, 939.63 and 215.65

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Solution

The fourth proportional to 626.41, 939.63 and 215.65 is: 323.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.41 : 939.63 = 215.65 : x
  2. Step 2: Convert to fraction form
    626.41/939.63 = 215.65/x
  3. Step 3: Cross multiply
    626.41x = 939.63 × 215.65
  4. Step 4: Simplify right side
    626.41x = 202,630.13
  5. Step 5: Solve for x
    x = 202,630.13/626.41
  6. Step 6: Final answer
    x = 323.48

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Double scale
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Similar ratio
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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.