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Finding the Fourth Proportional to 834.89, 1,151.97 and 485.39

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Solution

The fourth proportional to 834.89, 1,151.97 and 485.39 is: 669.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.89 : 1,151.97 = 485.39 : x
  2. Step 2: Convert to fraction form
    834.89/1,151.97 = 485.39/x
  3. Step 3: Cross multiply
    834.89x = 1,151.97 × 485.39
  4. Step 4: Simplify right side
    834.89x = 559,154.72
  5. Step 5: Solve for x
    x = 559,154.72/834.89
  6. Step 6: Final answer
    x = 669.73

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Double scale
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1.5x scale

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.