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Finding the Fourth Proportional to 3,186.56, 4,779.92 and 878.04

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Solution

The fourth proportional to 3,186.56, 4,779.92 and 878.04 is: 1,317.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.56 : 4,779.92 = 878.04 : x
  2. Step 2: Convert to fraction form
    3,186.56/4,779.92 = 878.04/x
  3. Step 3: Cross multiply
    3,186.56x = 4,779.92 × 878.04
  4. Step 4: Simplify right side
    3,186.56x = 4,196,960.96
  5. Step 5: Solve for x
    x = 4,196,960.96/3,186.56
  6. Step 6: Final answer
    x = 1,317.08

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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.