Home / 3,618.99-5,428.91-1,278.52

Finding the Fourth Proportional to 3,618.99, 5,428.91 and 1,278.52

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Solution

The fourth proportional to 3,618.99, 5,428.91 and 1,278.52 is: 1,917.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.99 : 5,428.91 = 1,278.52 : x
  2. Step 2: Convert to fraction form
    3,618.99/5,428.91 = 1,278.52/x
  3. Step 3: Cross multiply
    3,618.99x = 5,428.91 × 1,278.52
  4. Step 4: Simplify right side
    3,618.99x = 6,940,959.64
  5. Step 5: Solve for x
    x = 6,940,959.64/3,618.99
  6. Step 6: Final answer
    x = 1,917.93

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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.