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Finding the Fourth Proportional to 838.23, 1,157.32 and 749.42

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Solution

The fourth proportional to 838.23, 1,157.32 and 749.42 is: 1,034.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.23 : 1,157.32 = 749.42 : x
  2. Step 2: Convert to fraction form
    838.23/1,157.32 = 749.42/x
  3. Step 3: Cross multiply
    838.23x = 1,157.32 × 749.42
  4. Step 4: Simplify right side
    838.23x = 867,324.75
  5. Step 5: Solve for x
    x = 867,324.75/838.23
  6. Step 6: Final answer
    x = 1,034.71

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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.