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Finding the Fourth Proportional to 3,608.79, 4,980.21 and 2,015.52

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Solution

The fourth proportional to 3,608.79, 4,980.21 and 2,015.52 is: 2,781.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.79 : 4,980.21 = 2,015.52 : x
  2. Step 2: Convert to fraction form
    3,608.79/4,980.21 = 2,015.52/x
  3. Step 3: Cross multiply
    3,608.79x = 4,980.21 × 2,015.52
  4. Step 4: Simplify right side
    3,608.79x = 10,037,712.86
  5. Step 5: Solve for x
    x = 10,037,712.86/3,608.79
  6. Step 6: Final answer
    x = 2,781.46

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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.