Home / 2,777.92-4,168.80-1,998.40

Finding the Fourth Proportional to 2,777.92, 4,168.80 and 1,998.40

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Solution

The fourth proportional to 2,777.92, 4,168.80 and 1,998.40 is: 2,998.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.92 : 4,168.80 = 1,998.40 : x
  2. Step 2: Convert to fraction form
    2,777.92/4,168.80 = 1,998.40/x
  3. Step 3: Cross multiply
    2,777.92x = 4,168.80 × 1,998.40
  4. Step 4: Simplify right side
    2,777.92x = 8,330,929.92
  5. Step 5: Solve for x
    x = 8,330,929.92/2,777.92
  6. Step 6: Final answer
    x = 2,998.98

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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.