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Finding the Fourth Proportional to 834.93, 1,153.71 and 648.90

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Solution

The fourth proportional to 834.93, 1,153.71 and 648.90 is: 896.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.93 : 1,153.71 = 648.90 : x
  2. Step 2: Convert to fraction form
    834.93/1,153.71 = 648.90/x
  3. Step 3: Cross multiply
    834.93x = 1,153.71 × 648.90
  4. Step 4: Simplify right side
    834.93x = 748,642.42
  5. Step 5: Solve for x
    x = 748,642.42/834.93
  6. Step 6: Final answer
    x = 896.65

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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.