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Finding the Fourth Proportional to 901.38, 1,242.49 and 826.05

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Solution

The fourth proportional to 901.38, 1,242.49 and 826.05 is: 1,138.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.38 : 1,242.49 = 826.05 : x
  2. Step 2: Convert to fraction form
    901.38/1,242.49 = 826.05/x
  3. Step 3: Cross multiply
    901.38x = 1,242.49 × 826.05
  4. Step 4: Simplify right side
    901.38x = 1,026,358.86
  5. Step 5: Solve for x
    x = 1,026,358.86/901.38
  6. Step 6: Final answer
    x = 1,138.65

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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.