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Finding the Fourth Proportional to 801.37, 1,201.68 and 411.58

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Solution

The fourth proportional to 801.37, 1,201.68 and 411.58 is: 617.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.37 : 1,201.68 = 411.58 : x
  2. Step 2: Convert to fraction form
    801.37/1,201.68 = 411.58/x
  3. Step 3: Cross multiply
    801.37x = 1,201.68 × 411.58
  4. Step 4: Simplify right side
    801.37x = 494,587.45
  5. Step 5: Solve for x
    x = 494,587.45/801.37
  6. Step 6: Final answer
    x = 617.18

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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.