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Finding the Fourth Proportional to 798.93, 1,198.71 and 474.48

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Solution

The fourth proportional to 798.93, 1,198.71 and 474.48 is: 711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.93 : 1,198.71 = 474.48 : x
  2. Step 2: Convert to fraction form
    798.93/1,198.71 = 474.48/x
  3. Step 3: Cross multiply
    798.93x = 1,198.71 × 474.48
  4. Step 4: Simplify right side
    798.93x = 568,763.92
  5. Step 5: Solve for x
    x = 568,763.92/798.93
  6. Step 6: Final answer
    x = 711.91

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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.