Home / 2,991.39-4,127.78-1,664.91

Finding the Fourth Proportional to 2,991.39, 4,127.78 and 1,664.91

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Solution

The fourth proportional to 2,991.39, 4,127.78 and 1,664.91 is: 2,297.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.39 : 4,127.78 = 1,664.91 : x
  2. Step 2: Convert to fraction form
    2,991.39/4,127.78 = 1,664.91/x
  3. Step 3: Cross multiply
    2,991.39x = 4,127.78 × 1,664.91
  4. Step 4: Simplify right side
    2,991.39x = 6,872,373.88
  5. Step 5: Solve for x
    x = 6,872,373.88/2,991.39
  6. Step 6: Final answer
    x = 2,297.38

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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.