Home / 2,991.31-4,128.08-1,665.14

Finding the Fourth Proportional to 2,991.31, 4,128.08 and 1,665.14

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Solution

The fourth proportional to 2,991.31, 4,128.08 and 1,665.14 is: 2,297.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.31 : 4,128.08 = 1,665.14 : x
  2. Step 2: Convert to fraction form
    2,991.31/4,128.08 = 1,665.14/x
  3. Step 3: Cross multiply
    2,991.31x = 4,128.08 × 1,665.14
  4. Step 4: Simplify right side
    2,991.31x = 6,873,831.13
  5. Step 5: Solve for x
    x = 6,873,831.13/2,991.31
  6. Step 6: Final answer
    x = 2,297.93

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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.