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Finding the Fourth Proportional to 827.40, 1,241.24 and 279.58

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Solution

The fourth proportional to 827.40, 1,241.24 and 279.58 is: 419.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.40 : 1,241.24 = 279.58 : x
  2. Step 2: Convert to fraction form
    827.40/1,241.24 = 279.58/x
  3. Step 3: Cross multiply
    827.40x = 1,241.24 × 279.58
  4. Step 4: Simplify right side
    827.40x = 347,025.88
  5. Step 5: Solve for x
    x = 347,025.88/827.40
  6. Step 6: Final answer
    x = 419.42

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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.