Home / 2,990.43-4,127.09-1,812.33

Finding the Fourth Proportional to 2,990.43, 4,127.09 and 1,812.33

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Solution

The fourth proportional to 2,990.43, 4,127.09 and 1,812.33 is: 2,501.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.43 : 4,127.09 = 1,812.33 : x
  2. Step 2: Convert to fraction form
    2,990.43/4,127.09 = 1,812.33/x
  3. Step 3: Cross multiply
    2,990.43x = 4,127.09 × 1,812.33
  4. Step 4: Simplify right side
    2,990.43x = 7,479,639.96
  5. Step 5: Solve for x
    x = 7,479,639.96/2,990.43
  6. Step 6: Final answer
    x = 2,501.19

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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.