Home / 3,145.10-4,340.32-1,728.86

Finding the Fourth Proportional to 3,145.10, 4,340.32 and 1,728.86

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Solution

The fourth proportional to 3,145.10, 4,340.32 and 1,728.86 is: 2,385.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.10 : 4,340.32 = 1,728.86 : x
  2. Step 2: Convert to fraction form
    3,145.10/4,340.32 = 1,728.86/x
  3. Step 3: Cross multiply
    3,145.10x = 4,340.32 × 1,728.86
  4. Step 4: Simplify right side
    3,145.10x = 7,503,805.64
  5. Step 5: Solve for x
    x = 7,503,805.64/3,145.10
  6. Step 6: Final answer
    x = 2,385.87

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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.