Home / 3,115.56-4,299.28-1,788.33

Finding the Fourth Proportional to 3,115.56, 4,299.28 and 1,788.33

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Solution

The fourth proportional to 3,115.56, 4,299.28 and 1,788.33 is: 2,467.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.56 : 4,299.28 = 1,788.33 : x
  2. Step 2: Convert to fraction form
    3,115.56/4,299.28 = 1,788.33/x
  3. Step 3: Cross multiply
    3,115.56x = 4,299.28 × 1,788.33
  4. Step 4: Simplify right side
    3,115.56x = 7,688,526.93
  5. Step 5: Solve for x
    x = 7,688,526.93/3,115.56
  6. Step 6: Final answer
    x = 2,467.78

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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.