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Finding the Fourth Proportional to 2,418.96, 3,629.05 and 687.59

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Solution

The fourth proportional to 2,418.96, 3,629.05 and 687.59 is: 1,031.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,418.96 : 3,629.05 = 687.59 : x
  2. Step 2: Convert to fraction form
    2,418.96/3,629.05 = 687.59/x
  3. Step 3: Cross multiply
    2,418.96x = 3,629.05 × 687.59
  4. Step 4: Simplify right side
    2,418.96x = 2,495,284.44
  5. Step 5: Solve for x
    x = 2,495,284.44/2,418.96
  6. Step 6: Final answer
    x = 1,031.55

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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.