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Finding the Fourth Proportional to 3,608.73, 4,980 and 2,015.49

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Solution

The fourth proportional to 3,608.73, 4,980 and 2,015.49 is: 2,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.73 : 4,980 = 2,015.49 : x
  2. Step 2: Convert to fraction form
    3,608.73/4,980 = 2,015.49/x
  3. Step 3: Cross multiply
    3,608.73x = 4,980 × 2,015.49
  4. Step 4: Simplify right side
    3,608.73x = 10,037,140.20
  5. Step 5: Solve for x
    x = 10,037,140.20/3,608.73
  6. Step 6: Final answer
    x = 2,781.35

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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.