Home / 2,178.80-3,006.77-1,294.79

Finding the Fourth Proportional to 2,178.80, 3,006.77 and 1,294.79

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Solution

The fourth proportional to 2,178.80, 3,006.77 and 1,294.79 is: 1,786.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.80 : 3,006.77 = 1,294.79 : x
  2. Step 2: Convert to fraction form
    2,178.80/3,006.77 = 1,294.79/x
  3. Step 3: Cross multiply
    2,178.80x = 3,006.77 × 1,294.79
  4. Step 4: Simplify right side
    2,178.80x = 3,893,121.50
  5. Step 5: Solve for x
    x = 3,893,121.50/2,178.80
  6. Step 6: Final answer
    x = 1,786.82

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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.