Home / 2,190.78-3,023.34-1,306.56

Finding the Fourth Proportional to 2,190.78, 3,023.34 and 1,306.56

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Solution

The fourth proportional to 2,190.78, 3,023.34 and 1,306.56 is: 1,803.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.78 : 3,023.34 = 1,306.56 : x
  2. Step 2: Convert to fraction form
    2,190.78/3,023.34 = 1,306.56/x
  3. Step 3: Cross multiply
    2,190.78x = 3,023.34 × 1,306.56
  4. Step 4: Simplify right side
    2,190.78x = 3,950,175.11
  5. Step 5: Solve for x
    x = 3,950,175.11/2,190.78
  6. Step 6: Final answer
    x = 1,803.09

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1.5x scale

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.