Home / 3,386.07-5,074.92-1,920.78

Finding the Fourth Proportional to 3,386.07, 5,074.92 and 1,920.78

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Solution

The fourth proportional to 3,386.07, 5,074.92 and 1,920.78 is: 2,878.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.07 : 5,074.92 = 1,920.78 : x
  2. Step 2: Convert to fraction form
    3,386.07/5,074.92 = 1,920.78/x
  3. Step 3: Cross multiply
    3,386.07x = 5,074.92 × 1,920.78
  4. Step 4: Simplify right side
    3,386.07x = 9,747,804.84
  5. Step 5: Solve for x
    x = 9,747,804.84/3,386.07
  6. Step 6: Final answer
    x = 2,878.80

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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.