Home / 1,977.26-2,727.78-1,388.18

Finding the Fourth Proportional to 1,977.26, 2,727.78 and 1,388.18

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Solution

The fourth proportional to 1,977.26, 2,727.78 and 1,388.18 is: 1,915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.26 : 2,727.78 = 1,388.18 : x
  2. Step 2: Convert to fraction form
    1,977.26/2,727.78 = 1,388.18/x
  3. Step 3: Cross multiply
    1,977.26x = 2,727.78 × 1,388.18
  4. Step 4: Simplify right side
    1,977.26x = 3,786,649.64
  5. Step 5: Solve for x
    x = 3,786,649.64/1,977.26
  6. Step 6: Final answer
    x = 1,915.10

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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.