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Finding the Fourth Proportional to 1,198.71, 1,795.91 and 581.54

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Solution

The fourth proportional to 1,198.71, 1,795.91 and 581.54 is: 871.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.71 : 1,795.91 = 581.54 : x
  2. Step 2: Convert to fraction form
    1,198.71/1,795.91 = 581.54/x
  3. Step 3: Cross multiply
    1,198.71x = 1,795.91 × 581.54
  4. Step 4: Simplify right side
    1,198.71x = 1,044,381.61
  5. Step 5: Solve for x
    x = 1,044,381.61/1,198.71
  6. Step 6: Final answer
    x = 871.25

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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.