Home / 2,990.75-4,127.33-1,871.33

Finding the Fourth Proportional to 2,990.75, 4,127.33 and 1,871.33

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Solution

The fourth proportional to 2,990.75, 4,127.33 and 1,871.33 is: 2,582.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.75 : 4,127.33 = 1,871.33 : x
  2. Step 2: Convert to fraction form
    2,990.75/4,127.33 = 1,871.33/x
  3. Step 3: Cross multiply
    2,990.75x = 4,127.33 × 1,871.33
  4. Step 4: Simplify right side
    2,990.75x = 7,723,596.45
  5. Step 5: Solve for x
    x = 7,723,596.45/2,990.75
  6. Step 6: Final answer
    x = 2,582.49

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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.