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Finding the Fourth Proportional to 1,747.67, 2,621.91 and 515.09

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Solution

The fourth proportional to 1,747.67, 2,621.91 and 515.09 is: 772.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,747.67 : 2,621.91 = 515.09 : x
  2. Step 2: Convert to fraction form
    1,747.67/2,621.91 = 515.09/x
  3. Step 3: Cross multiply
    1,747.67x = 2,621.91 × 515.09
  4. Step 4: Simplify right side
    1,747.67x = 1,350,519.62
  5. Step 5: Solve for x
    x = 1,350,519.62/1,747.67
  6. Step 6: Final answer
    x = 772.75

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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.