Home / 1,930.07-2,660.85-1,221.56

Finding the Fourth Proportional to 1,930.07, 2,660.85 and 1,221.56

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Solution

The fourth proportional to 1,930.07, 2,660.85 and 1,221.56 is: 1,684.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.07 : 2,660.85 = 1,221.56 : x
  2. Step 2: Convert to fraction form
    1,930.07/2,660.85 = 1,221.56/x
  3. Step 3: Cross multiply
    1,930.07x = 2,660.85 × 1,221.56
  4. Step 4: Simplify right side
    1,930.07x = 3,250,387.93
  5. Step 5: Solve for x
    x = 3,250,387.93/1,930.07
  6. Step 6: Final answer
    x = 1,684.08

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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.