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Finding the Fourth Proportional to 834.44, 1,151.69 and 485.19

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Solution

The fourth proportional to 834.44, 1,151.69 and 485.19 is: 669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.44 : 1,151.69 = 485.19 : x
  2. Step 2: Convert to fraction form
    834.44/1,151.69 = 485.19/x
  3. Step 3: Cross multiply
    834.44x = 1,151.69 × 485.19
  4. Step 4: Simplify right side
    834.44x = 558,786.05
  5. Step 5: Solve for x
    x = 558,786.05/834.44
  6. Step 6: Final answer
    x = 669.66

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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.