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Finding the Fourth Proportional to 827.36, 1,239.48 and 441.68

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Solution

The fourth proportional to 827.36, 1,239.48 and 441.68 is: 661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.36 : 1,239.48 = 441.68 : x
  2. Step 2: Convert to fraction form
    827.36/1,239.48 = 441.68/x
  3. Step 3: Cross multiply
    827.36x = 1,239.48 × 441.68
  4. Step 4: Simplify right side
    827.36x = 547,453.53
  5. Step 5: Solve for x
    x = 547,453.53/827.36
  6. Step 6: Final answer
    x = 661.69

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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.