Home / 2,138.28-3,207.16-578.43

Finding the Fourth Proportional to 2,138.28, 3,207.16 and 578.43

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Solution

The fourth proportional to 2,138.28, 3,207.16 and 578.43 is: 867.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.28 : 3,207.16 = 578.43 : x
  2. Step 2: Convert to fraction form
    2,138.28/3,207.16 = 578.43/x
  3. Step 3: Cross multiply
    2,138.28x = 3,207.16 × 578.43
  4. Step 4: Simplify right side
    2,138.28x = 1,855,117.56
  5. Step 5: Solve for x
    x = 1,855,117.56/2,138.28
  6. Step 6: Final answer
    x = 867.57

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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.