Home / 5,390.78-8,080.20-2,269.88

Finding the Fourth Proportional to 5,390.78, 8,080.20 and 2,269.88

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Solution

The fourth proportional to 5,390.78, 8,080.20 and 2,269.88 is: 3,402.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.78 : 8,080.20 = 2,269.88 : x
  2. Step 2: Convert to fraction form
    5,390.78/8,080.20 = 2,269.88/x
  3. Step 3: Cross multiply
    5,390.78x = 8,080.20 × 2,269.88
  4. Step 4: Simplify right side
    5,390.78x = 18,341,084.38
  5. Step 5: Solve for x
    x = 18,341,084.38/5,390.78
  6. Step 6: Final answer
    x = 3,402.31

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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.