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Finding the Fourth Proportional to 3,186.38, 4,779.56 and 877.88

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Solution

The fourth proportional to 3,186.38, 4,779.56 and 877.88 is: 1,316.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.38 : 4,779.56 = 877.88 : x
  2. Step 2: Convert to fraction form
    3,186.38/4,779.56 = 877.88/x
  3. Step 3: Cross multiply
    3,186.38x = 4,779.56 × 877.88
  4. Step 4: Simplify right side
    3,186.38x = 4,195,858.43
  5. Step 5: Solve for x
    x = 4,195,858.43/3,186.38
  6. Step 6: Final answer
    x = 1,316.81

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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.