Home / 2,991.93-4,128.75-1,665.61

Finding the Fourth Proportional to 2,991.93, 4,128.75 and 1,665.61

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Solution

The fourth proportional to 2,991.93, 4,128.75 and 1,665.61 is: 2,298.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.93 : 4,128.75 = 1,665.61 : x
  2. Step 2: Convert to fraction form
    2,991.93/4,128.75 = 1,665.61/x
  3. Step 3: Cross multiply
    2,991.93x = 4,128.75 × 1,665.61
  4. Step 4: Simplify right side
    2,991.93x = 6,876,881.13
  5. Step 5: Solve for x
    x = 6,876,881.13/2,991.93
  6. Step 6: Final answer
    x = 2,298.47

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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.