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Finding the Fourth Proportional to 2,641.23, 3,961.85 and 792.32

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Solution

The fourth proportional to 2,641.23, 3,961.85 and 792.32 is: 1,188.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.23 : 3,961.85 = 792.32 : x
  2. Step 2: Convert to fraction form
    2,641.23/3,961.85 = 792.32/x
  3. Step 3: Cross multiply
    2,641.23x = 3,961.85 × 792.32
  4. Step 4: Simplify right side
    2,641.23x = 3,139,029.22
  5. Step 5: Solve for x
    x = 3,139,029.22/2,641.23
  6. Step 6: Final answer
    x = 1,188.47

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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.