Home / 2,666.12-3,998.16-1,278.59

Finding the Fourth Proportional to 2,666.12, 3,998.16 and 1,278.59

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Solution

The fourth proportional to 2,666.12, 3,998.16 and 1,278.59 is: 1,917.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.12 : 3,998.16 = 1,278.59 : x
  2. Step 2: Convert to fraction form
    2,666.12/3,998.16 = 1,278.59/x
  3. Step 3: Cross multiply
    2,666.12x = 3,998.16 × 1,278.59
  4. Step 4: Simplify right side
    2,666.12x = 5,111,987.40
  5. Step 5: Solve for x
    x = 5,111,987.40/2,666.12
  6. Step 6: Final answer
    x = 1,917.39

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1.5x scale

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.