Home / 3,078.18-4,247.73-1,680.66

Finding the Fourth Proportional to 3,078.18, 4,247.73 and 1,680.66

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Solution

The fourth proportional to 3,078.18, 4,247.73 and 1,680.66 is: 2,319.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.18 : 4,247.73 = 1,680.66 : x
  2. Step 2: Convert to fraction form
    3,078.18/4,247.73 = 1,680.66/x
  3. Step 3: Cross multiply
    3,078.18x = 4,247.73 × 1,680.66
  4. Step 4: Simplify right side
    3,078.18x = 7,138,989.90
  5. Step 5: Solve for x
    x = 7,138,989.90/3,078.18
  6. Step 6: Final answer
    x = 2,319.22

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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.