Home / 2,990.99-4,127.36-1,871.88

Finding the Fourth Proportional to 2,990.99, 4,127.36 and 1,871.88

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Solution

The fourth proportional to 2,990.99, 4,127.36 and 1,871.88 is: 2,583.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.99 : 4,127.36 = 1,871.88 : x
  2. Step 2: Convert to fraction form
    2,990.99/4,127.36 = 1,871.88/x
  3. Step 3: Cross multiply
    2,990.99x = 4,127.36 × 1,871.88
  4. Step 4: Simplify right side
    2,990.99x = 7,725,922.64
  5. Step 5: Solve for x
    x = 7,725,922.64/2,990.99
  6. Step 6: Final answer
    x = 2,583.07

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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.