Home / 2,990.20-4,487.62-2,072.19

Finding the Fourth Proportional to 2,990.20, 4,487.62 and 2,072.19

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Solution

The fourth proportional to 2,990.20, 4,487.62 and 2,072.19 is: 3,109.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.20 : 4,487.62 = 2,072.19 : x
  2. Step 2: Convert to fraction form
    2,990.20/4,487.62 = 2,072.19/x
  3. Step 3: Cross multiply
    2,990.20x = 4,487.62 × 2,072.19
  4. Step 4: Simplify right side
    2,990.20x = 9,299,201.29
  5. Step 5: Solve for x
    x = 9,299,201.29/2,990.20
  6. Step 6: Final answer
    x = 3,109.89

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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.