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Finding the Fourth Proportional to 2,720.51, 4,082.39 and 989.27

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Solution

The fourth proportional to 2,720.51, 4,082.39 and 989.27 is: 1,484.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.51 : 4,082.39 = 989.27 : x
  2. Step 2: Convert to fraction form
    2,720.51/4,082.39 = 989.27/x
  3. Step 3: Cross multiply
    2,720.51x = 4,082.39 × 989.27
  4. Step 4: Simplify right side
    2,720.51x = 4,038,585.96
  5. Step 5: Solve for x
    x = 4,038,585.96/2,720.51
  6. Step 6: Final answer
    x = 1,484.50

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1.5x scale

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.