Home / 2,720.12-4,081.80-988.88

Finding the Fourth Proportional to 2,720.12, 4,081.80 and 988.88

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Solution

The fourth proportional to 2,720.12, 4,081.80 and 988.88 is: 1,483.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.12 : 4,081.80 = 988.88 : x
  2. Step 2: Convert to fraction form
    2,720.12/4,081.80 = 988.88/x
  3. Step 3: Cross multiply
    2,720.12x = 4,081.80 × 988.88
  4. Step 4: Simplify right side
    2,720.12x = 4,036,410.38
  5. Step 5: Solve for x
    x = 4,036,410.38/2,720.12
  6. Step 6: Final answer
    x = 1,483.91

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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.