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Finding the Fourth Proportional to 834.67, 1,143.47 and 803.51

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Solution

The fourth proportional to 834.67, 1,143.47 and 803.51 is: 1,100.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.67 : 1,143.47 = 803.51 : x
  2. Step 2: Convert to fraction form
    834.67/1,143.47 = 803.51/x
  3. Step 3: Cross multiply
    834.67x = 1,143.47 × 803.51
  4. Step 4: Simplify right side
    834.67x = 918,789.58
  5. Step 5: Solve for x
    x = 918,789.58/834.67
  6. Step 6: Final answer
    x = 1,100.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.