Home / 2,138.18-2,949.09-1,439.42

Finding the Fourth Proportional to 2,138.18, 2,949.09 and 1,439.42

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Solution

The fourth proportional to 2,138.18, 2,949.09 and 1,439.42 is: 1,985.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.18 : 2,949.09 = 1,439.42 : x
  2. Step 2: Convert to fraction form
    2,138.18/2,949.09 = 1,439.42/x
  3. Step 3: Cross multiply
    2,138.18x = 2,949.09 × 1,439.42
  4. Step 4: Simplify right side
    2,138.18x = 4,244,979.13
  5. Step 5: Solve for x
    x = 4,244,979.13/2,138.18
  6. Step 6: Final answer
    x = 1,985.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.