Home / 3,107.86-4,288.74-1,691.57

Finding the Fourth Proportional to 3,107.86, 4,288.74 and 1,691.57

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Solution

The fourth proportional to 3,107.86, 4,288.74 and 1,691.57 is: 2,334.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.86 : 4,288.74 = 1,691.57 : x
  2. Step 2: Convert to fraction form
    3,107.86/4,288.74 = 1,691.57/x
  3. Step 3: Cross multiply
    3,107.86x = 4,288.74 × 1,691.57
  4. Step 4: Simplify right side
    3,107.86x = 7,254,703.92
  5. Step 5: Solve for x
    x = 7,254,703.92/3,107.86
  6. Step 6: Final answer
    x = 2,334.31

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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.