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Finding the Fourth Proportional to 800.52, 1,198.20 and 429.81

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Solution

The fourth proportional to 800.52, 1,198.20 and 429.81 is: 643.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.52 : 1,198.20 = 429.81 : x
  2. Step 2: Convert to fraction form
    800.52/1,198.20 = 429.81/x
  3. Step 3: Cross multiply
    800.52x = 1,198.20 × 429.81
  4. Step 4: Simplify right side
    800.52x = 514,998.34
  5. Step 5: Solve for x
    x = 514,998.34/800.52
  6. Step 6: Final answer
    x = 643.33

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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.