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Finding the Fourth Proportional to 2,115.84, 3,175.56 and 818.22

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Solution

The fourth proportional to 2,115.84, 3,175.56 and 818.22 is: 1,228.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.84 : 3,175.56 = 818.22 : x
  2. Step 2: Convert to fraction form
    2,115.84/3,175.56 = 818.22/x
  3. Step 3: Cross multiply
    2,115.84x = 3,175.56 × 818.22
  4. Step 4: Simplify right side
    2,115.84x = 2,598,306.70
  5. Step 5: Solve for x
    x = 2,598,306.70/2,115.84
  6. Step 6: Final answer
    x = 1,228.03

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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.