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Finding the Fourth Proportional to 1,813.22, 2,720.25 and 658.97

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Solution

The fourth proportional to 1,813.22, 2,720.25 and 658.97 is: 988.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.22 : 2,720.25 = 658.97 : x
  2. Step 2: Convert to fraction form
    1,813.22/2,720.25 = 658.97/x
  3. Step 3: Cross multiply
    1,813.22x = 2,720.25 × 658.97
  4. Step 4: Simplify right side
    1,813.22x = 1,792,559.74
  5. Step 5: Solve for x
    x = 1,792,559.74/1,813.22
  6. Step 6: Final answer
    x = 988.61

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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.