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Finding the Fourth Proportional to 2,672.40, 4,008.97 and 823.67

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Solution

The fourth proportional to 2,672.40, 4,008.97 and 823.67 is: 1,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.40 : 4,008.97 = 823.67 : x
  2. Step 2: Convert to fraction form
    2,672.40/4,008.97 = 823.67/x
  3. Step 3: Cross multiply
    2,672.40x = 4,008.97 × 823.67
  4. Step 4: Simplify right side
    2,672.40x = 3,302,048.28
  5. Step 5: Solve for x
    x = 3,302,048.28/2,672.40
  6. Step 6: Final answer
    x = 1,235.61

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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.