Home / 2,897.80-3,998.67-1,778.79

Finding the Fourth Proportional to 2,897.80, 3,998.67 and 1,778.79

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Solution

The fourth proportional to 2,897.80, 3,998.67 and 1,778.79 is: 2,454.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,897.80 : 3,998.67 = 1,778.79 : x
  2. Step 2: Convert to fraction form
    2,897.80/3,998.67 = 1,778.79/x
  3. Step 3: Cross multiply
    2,897.80x = 3,998.67 × 1,778.79
  4. Step 4: Simplify right side
    2,897.80x = 7,112,794.21
  5. Step 5: Solve for x
    x = 7,112,794.21/2,897.80
  6. Step 6: Final answer
    x = 2,454.55

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1.5x scale

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.