Home / 2,117.07-3,175.81-818.64

Finding the Fourth Proportional to 2,117.07, 3,175.81 and 818.64

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Solution

The fourth proportional to 2,117.07, 3,175.81 and 818.64 is: 1,228.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.07 : 3,175.81 = 818.64 : x
  2. Step 2: Convert to fraction form
    2,117.07/3,175.81 = 818.64/x
  3. Step 3: Cross multiply
    2,117.07x = 3,175.81 × 818.64
  4. Step 4: Simplify right side
    2,117.07x = 2,599,843.05
  5. Step 5: Solve for x
    x = 2,599,843.05/2,117.07
  6. Step 6: Final answer
    x = 1,228.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.