Home / 2,418.85-3,628.20-687.47

Finding the Fourth Proportional to 2,418.85, 3,628.20 and 687.47

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Solution

The fourth proportional to 2,418.85, 3,628.20 and 687.47 is: 1,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,418.85 : 3,628.20 = 687.47 : x
  2. Step 2: Convert to fraction form
    2,418.85/3,628.20 = 687.47/x
  3. Step 3: Cross multiply
    2,418.85x = 3,628.20 × 687.47
  4. Step 4: Simplify right side
    2,418.85x = 2,494,293.24
  5. Step 5: Solve for x
    x = 2,494,293.24/2,418.85
  6. Step 6: Final answer
    x = 1,031.19

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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.