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Finding the Fourth Proportional to 800.64, 1,199.74 and 475.66

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Solution

The fourth proportional to 800.64, 1,199.74 and 475.66 is: 712.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.64 : 1,199.74 = 475.66 : x
  2. Step 2: Convert to fraction form
    800.64/1,199.74 = 475.66/x
  3. Step 3: Cross multiply
    800.64x = 1,199.74 × 475.66
  4. Step 4: Simplify right side
    800.64x = 570,668.33
  5. Step 5: Solve for x
    x = 570,668.33/800.64
  6. Step 6: Final answer
    x = 712.77

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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.