Home / 2,991.18-4,127.90-1,664.80

Finding the Fourth Proportional to 2,991.18, 4,127.90 and 1,664.80

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Solution

The fourth proportional to 2,991.18, 4,127.90 and 1,664.80 is: 2,297.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.18 : 4,127.90 = 1,664.80 : x
  2. Step 2: Convert to fraction form
    2,991.18/4,127.90 = 1,664.80/x
  3. Step 3: Cross multiply
    2,991.18x = 4,127.90 × 1,664.80
  4. Step 4: Simplify right side
    2,991.18x = 6,872,132.08
  5. Step 5: Solve for x
    x = 6,872,132.08/2,991.18
  6. Step 6: Final answer
    x = 2,297.47

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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.