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Finding the Fourth Proportional to 2,720.01, 4,081.84 and 988.64

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Solution

The fourth proportional to 2,720.01, 4,081.84 and 988.64 is: 1,483.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.01 : 4,081.84 = 988.64 : x
  2. Step 2: Convert to fraction form
    2,720.01/4,081.84 = 988.64/x
  3. Step 3: Cross multiply
    2,720.01x = 4,081.84 × 988.64
  4. Step 4: Simplify right side
    2,720.01x = 4,035,462.56
  5. Step 5: Solve for x
    x = 4,035,462.56/2,720.01
  6. Step 6: Final answer
    x = 1,483.62

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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.