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Finding the Fourth Proportional to 834.26, 1,151.28 and 480.25

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Solution

The fourth proportional to 834.26, 1,151.28 and 480.25 is: 662.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.26 : 1,151.28 = 480.25 : x
  2. Step 2: Convert to fraction form
    834.26/1,151.28 = 480.25/x
  3. Step 3: Cross multiply
    834.26x = 1,151.28 × 480.25
  4. Step 4: Simplify right side
    834.26x = 552,903.66
  5. Step 5: Solve for x
    x = 552,903.66/834.26
  6. Step 6: Final answer
    x = 662.75

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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.