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Finding the Fourth Proportional to 2,641.24, 3,961.86 and 693.44

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Solution

The fourth proportional to 2,641.24, 3,961.86 and 693.44 is: 1,040.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.24 : 3,961.86 = 693.44 : x
  2. Step 2: Convert to fraction form
    2,641.24/3,961.86 = 693.44/x
  3. Step 3: Cross multiply
    2,641.24x = 3,961.86 × 693.44
  4. Step 4: Simplify right side
    2,641.24x = 2,747,312.20
  5. Step 5: Solve for x
    x = 2,747,312.20/2,641.24
  6. Step 6: Final answer
    x = 1,040.16

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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.