Home / 2,990.08-4,122.04-2,103.20

Finding the Fourth Proportional to 2,990.08, 4,122.04 and 2,103.20

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Solution

The fourth proportional to 2,990.08, 4,122.04 and 2,103.20 is: 2,899.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.08 : 4,122.04 = 2,103.20 : x
  2. Step 2: Convert to fraction form
    2,990.08/4,122.04 = 2,103.20/x
  3. Step 3: Cross multiply
    2,990.08x = 4,122.04 × 2,103.20
  4. Step 4: Simplify right side
    2,990.08x = 8,669,474.53
  5. Step 5: Solve for x
    x = 8,669,474.53/2,990.08
  6. Step 6: Final answer
    x = 2,899.41

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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.