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Finding the Fourth Proportional to 626.25, 939.36 and 215.67

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Solution

The fourth proportional to 626.25, 939.36 and 215.67 is: 323.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.25 : 939.36 = 215.67 : x
  2. Step 2: Convert to fraction form
    626.25/939.36 = 215.67/x
  3. Step 3: Cross multiply
    626.25x = 939.36 × 215.67
  4. Step 4: Simplify right side
    626.25x = 202,591.77
  5. Step 5: Solve for x
    x = 202,591.77/626.25
  6. Step 6: Final answer
    x = 323.50

Related Problems

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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.