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Finding the Fourth Proportional to 800.34, 1,199.66 and 388.62

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Solution

The fourth proportional to 800.34, 1,199.66 and 388.62 is: 582.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.34 : 1,199.66 = 388.62 : x
  2. Step 2: Convert to fraction form
    800.34/1,199.66 = 388.62/x
  3. Step 3: Cross multiply
    800.34x = 1,199.66 × 388.62
  4. Step 4: Simplify right side
    800.34x = 466,211.87
  5. Step 5: Solve for x
    x = 466,211.87/800.34
  6. Step 6: Final answer
    x = 582.52

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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.