Home / 2,990.20-4,484.34-1,139.92

Finding the Fourth Proportional to 2,990.20, 4,484.34 and 1,139.92

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Solution

The fourth proportional to 2,990.20, 4,484.34 and 1,139.92 is: 1,709.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.20 : 4,484.34 = 1,139.92 : x
  2. Step 2: Convert to fraction form
    2,990.20/4,484.34 = 1,139.92/x
  3. Step 3: Cross multiply
    2,990.20x = 4,484.34 × 1,139.92
  4. Step 4: Simplify right side
    2,990.20x = 5,111,788.85
  5. Step 5: Solve for x
    x = 5,111,788.85/2,990.20
  6. Step 6: Final answer
    x = 1,709.51

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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.