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Finding the Fourth Proportional to 834.88, 1,152.18 and 540.40

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Solution

The fourth proportional to 834.88, 1,152.18 and 540.40 is: 745.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.88 : 1,152.18 = 540.40 : x
  2. Step 2: Convert to fraction form
    834.88/1,152.18 = 540.40/x
  3. Step 3: Cross multiply
    834.88x = 1,152.18 × 540.40
  4. Step 4: Simplify right side
    834.88x = 622,638.07
  5. Step 5: Solve for x
    x = 622,638.07/834.88
  6. Step 6: Final answer
    x = 745.78

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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.