Home / 2,897.20-3,998.55-1,638.64

Finding the Fourth Proportional to 2,897.20, 3,998.55 and 1,638.64

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Solution

The fourth proportional to 2,897.20, 3,998.55 and 1,638.64 is: 2,261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,897.20 : 3,998.55 = 1,638.64 : x
  2. Step 2: Convert to fraction form
    2,897.20/3,998.55 = 1,638.64/x
  3. Step 3: Cross multiply
    2,897.20x = 3,998.55 × 1,638.64
  4. Step 4: Simplify right side
    2,897.20x = 6,552,183.97
  5. Step 5: Solve for x
    x = 6,552,183.97/2,897.20
  6. Step 6: Final answer
    x = 2,261.56

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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.