Home / 2,087.80-2,881.66-1,379.78

Finding the Fourth Proportional to 2,087.80, 2,881.66 and 1,379.78

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Solution

The fourth proportional to 2,087.80, 2,881.66 and 1,379.78 is: 1,904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.80 : 2,881.66 = 1,379.78 : x
  2. Step 2: Convert to fraction form
    2,087.80/2,881.66 = 1,379.78/x
  3. Step 3: Cross multiply
    2,087.80x = 2,881.66 × 1,379.78
  4. Step 4: Simplify right side
    2,087.80x = 3,976,056.83
  5. Step 5: Solve for x
    x = 3,976,056.83/2,087.80
  6. Step 6: Final answer
    x = 1,904.42

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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.