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Finding the Fourth Proportional to 834.48, 1,249.65 and 486.90

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Solution

The fourth proportional to 834.48, 1,249.65 and 486.90 is: 729.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.48 : 1,249.65 = 486.90 : x
  2. Step 2: Convert to fraction form
    834.48/1,249.65 = 486.90/x
  3. Step 3: Cross multiply
    834.48x = 1,249.65 × 486.90
  4. Step 4: Simplify right side
    834.48x = 608,454.59
  5. Step 5: Solve for x
    x = 608,454.59/834.48
  6. Step 6: Final answer
    x = 729.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.