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Finding the Fourth Proportional to 834.42, 1,151.99 and 742.15

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Solution

The fourth proportional to 834.42, 1,151.99 and 742.15 is: 1,024.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.42 : 1,151.99 = 742.15 : x
  2. Step 2: Convert to fraction form
    834.42/1,151.99 = 742.15/x
  3. Step 3: Cross multiply
    834.42x = 1,151.99 × 742.15
  4. Step 4: Simplify right side
    834.42x = 854,949.38
  5. Step 5: Solve for x
    x = 854,949.38/834.42
  6. Step 6: Final answer
    x = 1,024.60

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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.