Home / 3,898.11-5,378.81-2,219.58

Finding the Fourth Proportional to 3,898.11, 5,378.81 and 2,219.58

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Solution

The fourth proportional to 3,898.11, 5,378.81 and 2,219.58 is: 3,062.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.11 : 5,378.81 = 2,219.58 : x
  2. Step 2: Convert to fraction form
    3,898.11/5,378.81 = 2,219.58/x
  3. Step 3: Cross multiply
    3,898.11x = 5,378.81 × 2,219.58
  4. Step 4: Simplify right side
    3,898.11x = 11,938,688.00
  5. Step 5: Solve for x
    x = 11,938,688.00/3,898.11
  6. Step 6: Final answer
    x = 3,062.69

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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.