Home / 1,938.28-2,908.64-1,813.74

Finding the Fourth Proportional to 1,938.28, 2,908.64 and 1,813.74

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Solution

The fourth proportional to 1,938.28, 2,908.64 and 1,813.74 is: 2,721.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.28 : 2,908.64 = 1,813.74 : x
  2. Step 2: Convert to fraction form
    1,938.28/2,908.64 = 1,813.74/x
  3. Step 3: Cross multiply
    1,938.28x = 2,908.64 × 1,813.74
  4. Step 4: Simplify right side
    1,938.28x = 5,275,507.64
  5. Step 5: Solve for x
    x = 5,275,507.64/1,938.28
  6. Step 6: Final answer
    x = 2,721.75

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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.