Home / 2,991.40-4,127.94-1,665.07

Finding the Fourth Proportional to 2,991.40, 4,127.94 and 1,665.07

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Solution

The fourth proportional to 2,991.40, 4,127.94 and 1,665.07 is: 2,297.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.40 : 4,127.94 = 1,665.07 : x
  2. Step 2: Convert to fraction form
    2,991.40/4,127.94 = 1,665.07/x
  3. Step 3: Cross multiply
    2,991.40x = 4,127.94 × 1,665.07
  4. Step 4: Simplify right side
    2,991.40x = 6,873,298.74
  5. Step 5: Solve for x
    x = 6,873,298.74/2,991.40
  6. Step 6: Final answer
    x = 2,297.69

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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.