Home / 2,666.31-3,997.77-1,278.93

Finding the Fourth Proportional to 2,666.31, 3,997.77 and 1,278.93

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Solution

The fourth proportional to 2,666.31, 3,997.77 and 1,278.93 is: 1,917.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.31 : 3,997.77 = 1,278.93 : x
  2. Step 2: Convert to fraction form
    2,666.31/3,997.77 = 1,278.93/x
  3. Step 3: Cross multiply
    2,666.31x = 3,997.77 × 1,278.93
  4. Step 4: Simplify right side
    2,666.31x = 5,112,867.99
  5. Step 5: Solve for x
    x = 5,112,867.99/2,666.31
  6. Step 6: Final answer
    x = 1,917.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.