Home / 3,107.76-4,290.78-2,398.35

Finding the Fourth Proportional to 3,107.76, 4,290.78 and 2,398.35

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Solution

The fourth proportional to 3,107.76, 4,290.78 and 2,398.35 is: 3,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.76 : 4,290.78 = 2,398.35 : x
  2. Step 2: Convert to fraction form
    3,107.76/4,290.78 = 2,398.35/x
  3. Step 3: Cross multiply
    3,107.76x = 4,290.78 × 2,398.35
  4. Step 4: Simplify right side
    3,107.76x = 10,290,780.22
  5. Step 5: Solve for x
    x = 10,290,780.22/3,107.76
  6. Step 6: Final answer
    x = 3,311.32

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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.