Home / 1,839.10-2,757.70-540.40

Finding the Fourth Proportional to 1,839.10, 2,757.70 and 540.40

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Solution

The fourth proportional to 1,839.10, 2,757.70 and 540.40 is: 810.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.10 : 2,757.70 = 540.40 : x
  2. Step 2: Convert to fraction form
    1,839.10/2,757.70 = 540.40/x
  3. Step 3: Cross multiply
    1,839.10x = 2,757.70 × 540.40
  4. Step 4: Simplify right side
    1,839.10x = 1,490,261.08
  5. Step 5: Solve for x
    x = 1,490,261.08/1,839.10
  6. Step 6: Final answer
    x = 810.32

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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.