Home / 3,118.86-4,304.07-1,721.64

Finding the Fourth Proportional to 3,118.86, 4,304.07 and 1,721.64

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Solution

The fourth proportional to 3,118.86, 4,304.07 and 1,721.64 is: 2,375.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.86 : 4,304.07 = 1,721.64 : x
  2. Step 2: Convert to fraction form
    3,118.86/4,304.07 = 1,721.64/x
  3. Step 3: Cross multiply
    3,118.86x = 4,304.07 × 1,721.64
  4. Step 4: Simplify right side
    3,118.86x = 7,410,059.07
  5. Step 5: Solve for x
    x = 7,410,059.07/3,118.86
  6. Step 6: Final answer
    x = 2,375.89

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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.