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Finding the Fourth Proportional to 800.47, 1,200.84 and 475.39

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Solution

The fourth proportional to 800.47, 1,200.84 and 475.39 is: 713.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.47 : 1,200.84 = 475.39 : x
  2. Step 2: Convert to fraction form
    800.47/1,200.84 = 475.39/x
  3. Step 3: Cross multiply
    800.47x = 1,200.84 × 475.39
  4. Step 4: Simplify right side
    800.47x = 570,867.33
  5. Step 5: Solve for x
    x = 570,867.33/800.47
  6. Step 6: Final answer
    x = 713.17

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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.