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Finding the Fourth Proportional to 626.30, 939.45 and 215.72

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Solution

The fourth proportional to 626.30, 939.45 and 215.72 is: 323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.30 : 939.45 = 215.72 : x
  2. Step 2: Convert to fraction form
    626.30/939.45 = 215.72/x
  3. Step 3: Cross multiply
    626.30x = 939.45 × 215.72
  4. Step 4: Simplify right side
    626.30x = 202,658.15
  5. Step 5: Solve for x
    x = 202,658.15/626.30
  6. Step 6: Final answer
    x = 323.58

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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.