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Finding the Fourth Proportional to 827.43, 1,241.15 and 279.68

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Solution

The fourth proportional to 827.43, 1,241.15 and 279.68 is: 419.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.43 : 1,241.15 = 279.68 : x
  2. Step 2: Convert to fraction form
    827.43/1,241.15 = 279.68/x
  3. Step 3: Cross multiply
    827.43x = 1,241.15 × 279.68
  4. Step 4: Simplify right side
    827.43x = 347,117.23
  5. Step 5: Solve for x
    x = 347,117.23/827.43
  6. Step 6: Final answer
    x = 419.51

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Double scale
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Similar ratio
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1.5x scale

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.