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Finding the Fourth Proportional to 909.53, 1,251.25 and 743.38

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Solution

The fourth proportional to 909.53, 1,251.25 and 743.38 is: 1,022.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.53 : 1,251.25 = 743.38 : x
  2. Step 2: Convert to fraction form
    909.53/1,251.25 = 743.38/x
  3. Step 3: Cross multiply
    909.53x = 1,251.25 × 743.38
  4. Step 4: Simplify right side
    909.53x = 930,149.24
  5. Step 5: Solve for x
    x = 930,149.24/909.53
  6. Step 6: Final answer
    x = 1,022.67

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.