Home / 2,099.20-3,148.80-1,872.40

Finding the Fourth Proportional to 2,099.20, 3,148.80 and 1,872.40

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Solution

The fourth proportional to 2,099.20, 3,148.80 and 1,872.40 is: 2,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.20 : 3,148.80 = 1,872.40 : x
  2. Step 2: Convert to fraction form
    2,099.20/3,148.80 = 1,872.40/x
  3. Step 3: Cross multiply
    2,099.20x = 3,148.80 × 1,872.40
  4. Step 4: Simplify right side
    2,099.20x = 5,895,813.12
  5. Step 5: Solve for x
    x = 5,895,813.12/2,099.20
  6. Step 6: Final answer
    x = 2,808.60

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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.