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Finding the Fourth Proportional to 814.40, 1,122.96 and 552.56

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Solution

The fourth proportional to 814.40, 1,122.96 and 552.56 is: 761.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.40 : 1,122.96 = 552.56 : x
  2. Step 2: Convert to fraction form
    814.40/1,122.96 = 552.56/x
  3. Step 3: Cross multiply
    814.40x = 1,122.96 × 552.56
  4. Step 4: Simplify right side
    814.40x = 620,502.78
  5. Step 5: Solve for x
    x = 620,502.78/814.40
  6. Step 6: Final answer
    x = 761.91

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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.