Home / 2,419.32-3,628.97-687.95

Finding the Fourth Proportional to 2,419.32, 3,628.97 and 687.95

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Solution

The fourth proportional to 2,419.32, 3,628.97 and 687.95 is: 1,031.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.32 : 3,628.97 = 687.95 : x
  2. Step 2: Convert to fraction form
    2,419.32/3,628.97 = 687.95/x
  3. Step 3: Cross multiply
    2,419.32x = 3,628.97 × 687.95
  4. Step 4: Simplify right side
    2,419.32x = 2,496,528.33
  5. Step 5: Solve for x
    x = 2,496,528.33/2,419.32
  6. Step 6: Final answer
    x = 1,031.91

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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.