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Finding the Fourth Proportional to 834.96, 1,245.48 and 764.88

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Solution

The fourth proportional to 834.96, 1,245.48 and 764.88 is: 1,140.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.96 : 1,245.48 = 764.88 : x
  2. Step 2: Convert to fraction form
    834.96/1,245.48 = 764.88/x
  3. Step 3: Cross multiply
    834.96x = 1,245.48 × 764.88
  4. Step 4: Simplify right side
    834.96x = 952,642.74
  5. Step 5: Solve for x
    x = 952,642.74/834.96
  6. Step 6: Final answer
    x = 1,140.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.