Home / 3,005.15-4,147.20-1,679.18

Finding the Fourth Proportional to 3,005.15, 4,147.20 and 1,679.18

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Solution

The fourth proportional to 3,005.15, 4,147.20 and 1,679.18 is: 2,317.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.15 : 4,147.20 = 1,679.18 : x
  2. Step 2: Convert to fraction form
    3,005.15/4,147.20 = 1,679.18/x
  3. Step 3: Cross multiply
    3,005.15x = 4,147.20 × 1,679.18
  4. Step 4: Simplify right side
    3,005.15x = 6,963,874.56
  5. Step 5: Solve for x
    x = 6,963,874.56/3,005.15
  6. Step 6: Final answer
    x = 2,317.32

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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.