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Finding the Fourth Proportional to 816.26, 1,126.44 and 443.24

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Solution

The fourth proportional to 816.26, 1,126.44 and 443.24 is: 611.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.26 : 1,126.44 = 443.24 : x
  2. Step 2: Convert to fraction form
    816.26/1,126.44 = 443.24/x
  3. Step 3: Cross multiply
    816.26x = 1,126.44 × 443.24
  4. Step 4: Simplify right side
    816.26x = 499,278.74
  5. Step 5: Solve for x
    x = 499,278.74/816.26
  6. Step 6: Final answer
    x = 611.67

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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.