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Finding the Fourth Proportional to 800.87, 1,201.71 and 416.12

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Solution

The fourth proportional to 800.87, 1,201.71 and 416.12 is: 624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.87 : 1,201.71 = 416.12 : x
  2. Step 2: Convert to fraction form
    800.87/1,201.71 = 416.12/x
  3. Step 3: Cross multiply
    800.87x = 1,201.71 × 416.12
  4. Step 4: Simplify right side
    800.87x = 500,055.57
  5. Step 5: Solve for x
    x = 500,055.57/800.87
  6. Step 6: Final answer
    x = 624.39

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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.