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Finding the Fourth Proportional to 1,909.44, 2,864.16 and 1,388.16

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Solution

The fourth proportional to 1,909.44, 2,864.16 and 1,388.16 is: 2,082.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.44 : 2,864.16 = 1,388.16 : x
  2. Step 2: Convert to fraction form
    1,909.44/2,864.16 = 1,388.16/x
  3. Step 3: Cross multiply
    1,909.44x = 2,864.16 × 1,388.16
  4. Step 4: Simplify right side
    1,909.44x = 3,975,912.35
  5. Step 5: Solve for x
    x = 3,975,912.35/1,909.44
  6. Step 6: Final answer
    x = 2,082.24

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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.