Home / 2,720.16-4,081.44-989.04

Finding the Fourth Proportional to 2,720.16, 4,081.44 and 989.04

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Solution

The fourth proportional to 2,720.16, 4,081.44 and 989.04 is: 1,484.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.16 : 4,081.44 = 989.04 : x
  2. Step 2: Convert to fraction form
    2,720.16/4,081.44 = 989.04/x
  3. Step 3: Cross multiply
    2,720.16x = 4,081.44 × 989.04
  4. Step 4: Simplify right side
    2,720.16x = 4,036,707.42
  5. Step 5: Solve for x
    x = 4,036,707.42/2,720.16
  6. Step 6: Final answer
    x = 1,484.00

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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.