Home / 1,938.91-2,908.34-1,321.08

Finding the Fourth Proportional to 1,938.91, 2,908.34 and 1,321.08

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Solution

The fourth proportional to 1,938.91, 2,908.34 and 1,321.08 is: 1,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.91 : 2,908.34 = 1,321.08 : x
  2. Step 2: Convert to fraction form
    1,938.91/2,908.34 = 1,321.08/x
  3. Step 3: Cross multiply
    1,938.91x = 2,908.34 × 1,321.08
  4. Step 4: Simplify right side
    1,938.91x = 3,842,149.81
  5. Step 5: Solve for x
    x = 3,842,149.81/1,938.91
  6. Step 6: Final answer
    x = 1,981.60

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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.