Home / 2,727.20-4,090.40-878.08

Finding the Fourth Proportional to 2,727.20, 4,090.40 and 878.08

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Solution

The fourth proportional to 2,727.20, 4,090.40 and 878.08 is: 1,316.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,727.20 : 4,090.40 = 878.08 : x
  2. Step 2: Convert to fraction form
    2,727.20/4,090.40 = 878.08/x
  3. Step 3: Cross multiply
    2,727.20x = 4,090.40 × 878.08
  4. Step 4: Simplify right side
    2,727.20x = 3,591,677.98
  5. Step 5: Solve for x
    x = 3,591,677.98/2,727.20
  6. Step 6: Final answer
    x = 1,316.98

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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.