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Finding the Fourth Proportional to 1,813.39, 2,720.54 and 717.61

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Solution

The fourth proportional to 1,813.39, 2,720.54 and 717.61 is: 1,076.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.39 : 2,720.54 = 717.61 : x
  2. Step 2: Convert to fraction form
    1,813.39/2,720.54 = 717.61/x
  3. Step 3: Cross multiply
    1,813.39x = 2,720.54 × 717.61
  4. Step 4: Simplify right side
    1,813.39x = 1,952,282.77
  5. Step 5: Solve for x
    x = 1,952,282.77/1,813.39
  6. Step 6: Final answer
    x = 1,076.59

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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.