Home / 2,543.28-3,813-1,388.40

Finding the Fourth Proportional to 2,543.28, 3,813 and 1,388.40

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Solution

The fourth proportional to 2,543.28, 3,813 and 1,388.40 is: 2,081.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.28 : 3,813 = 1,388.40 : x
  2. Step 2: Convert to fraction form
    2,543.28/3,813 = 1,388.40/x
  3. Step 3: Cross multiply
    2,543.28x = 3,813 × 1,388.40
  4. Step 4: Simplify right side
    2,543.28x = 5,293,969.20
  5. Step 5: Solve for x
    x = 5,293,969.20/2,543.28
  6. Step 6: Final answer
    x = 2,081.55

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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.