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Finding the Fourth Proportional to 3,888.63, 5,832.92 and 1,115.31

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Solution

The fourth proportional to 3,888.63, 5,832.92 and 1,115.31 is: 1,672.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.63 : 5,832.92 = 1,115.31 : x
  2. Step 2: Convert to fraction form
    3,888.63/5,832.92 = 1,115.31/x
  3. Step 3: Cross multiply
    3,888.63x = 5,832.92 × 1,115.31
  4. Step 4: Simplify right side
    3,888.63x = 6,505,538.67
  5. Step 5: Solve for x
    x = 6,505,538.67/3,888.63
  6. Step 6: Final answer
    x = 1,672.96

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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.