Home / 2,138.64-2,949.53-1,392.02

Finding the Fourth Proportional to 2,138.64, 2,949.53 and 1,392.02

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Solution

The fourth proportional to 2,138.64, 2,949.53 and 1,392.02 is: 1,919.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.64 : 2,949.53 = 1,392.02 : x
  2. Step 2: Convert to fraction form
    2,138.64/2,949.53 = 1,392.02/x
  3. Step 3: Cross multiply
    2,138.64x = 2,949.53 × 1,392.02
  4. Step 4: Simplify right side
    2,138.64x = 4,105,805.16
  5. Step 5: Solve for x
    x = 4,105,805.16/2,138.64
  6. Step 6: Final answer
    x = 1,919.82

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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.