Home / 2,078.75-2,868.49-1,239.29

Finding the Fourth Proportional to 2,078.75, 2,868.49 and 1,239.29

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Solution

The fourth proportional to 2,078.75, 2,868.49 and 1,239.29 is: 1,710.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.75 : 2,868.49 = 1,239.29 : x
  2. Step 2: Convert to fraction form
    2,078.75/2,868.49 = 1,239.29/x
  3. Step 3: Cross multiply
    2,078.75x = 2,868.49 × 1,239.29
  4. Step 4: Simplify right side
    2,078.75x = 3,554,895.05
  5. Step 5: Solve for x
    x = 3,554,895.05/2,078.75
  6. Step 6: Final answer
    x = 1,710.11

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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.