Home / 2,117.45-3,176.18-818.75

Finding the Fourth Proportional to 2,117.45, 3,176.18 and 818.75

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Solution

The fourth proportional to 2,117.45, 3,176.18 and 818.75 is: 1,228.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.45 : 3,176.18 = 818.75 : x
  2. Step 2: Convert to fraction form
    2,117.45/3,176.18 = 818.75/x
  3. Step 3: Cross multiply
    2,117.45x = 3,176.18 × 818.75
  4. Step 4: Simplify right side
    2,117.45x = 2,600,493.28
  5. Step 5: Solve for x
    x = 2,600,493.28/2,117.45
  6. Step 6: Final answer
    x = 1,228.13

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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.