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Finding the Fourth Proportional to 801.03, 1,201.65 and 389.82

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Solution

The fourth proportional to 801.03, 1,201.65 and 389.82 is: 584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.03 : 1,201.65 = 389.82 : x
  2. Step 2: Convert to fraction form
    801.03/1,201.65 = 389.82/x
  3. Step 3: Cross multiply
    801.03x = 1,201.65 × 389.82
  4. Step 4: Simplify right side
    801.03x = 468,425.25
  5. Step 5: Solve for x
    x = 468,425.25/801.03
  6. Step 6: Final answer
    x = 584.78

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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.