Home / 2,225.10-3,338.11-838.40

Finding the Fourth Proportional to 2,225.10, 3,338.11 and 838.40

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Solution

The fourth proportional to 2,225.10, 3,338.11 and 838.40 is: 1,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.10 : 3,338.11 = 838.40 : x
  2. Step 2: Convert to fraction form
    2,225.10/3,338.11 = 838.40/x
  3. Step 3: Cross multiply
    2,225.10x = 3,338.11 × 838.40
  4. Step 4: Simplify right side
    2,225.10x = 2,798,673.52
  5. Step 5: Solve for x
    x = 2,798,673.52/2,225.10
  6. Step 6: Final answer
    x = 1,257.78

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1.5x scale

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.