Home / 3,897.78-5,378.56-2,219.59

Finding the Fourth Proportional to 3,897.78, 5,378.56 and 2,219.59

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Solution

The fourth proportional to 3,897.78, 5,378.56 and 2,219.59 is: 3,062.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.78 : 5,378.56 = 2,219.59 : x
  2. Step 2: Convert to fraction form
    3,897.78/5,378.56 = 2,219.59/x
  3. Step 3: Cross multiply
    3,897.78x = 5,378.56 × 2,219.59
  4. Step 4: Simplify right side
    3,897.78x = 11,938,197.99
  5. Step 5: Solve for x
    x = 11,938,197.99/3,897.78
  6. Step 6: Final answer
    x = 3,062.82

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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.