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Finding the Fourth Proportional to 335.66, 462.86 and 289.19

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Solution

The fourth proportional to 335.66, 462.86 and 289.19 is: 398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.66 : 462.86 = 289.19 : x
  2. Step 2: Convert to fraction form
    335.66/462.86 = 289.19/x
  3. Step 3: Cross multiply
    335.66x = 462.86 × 289.19
  4. Step 4: Simplify right side
    335.66x = 133,850.72
  5. Step 5: Solve for x
    x = 133,850.72/335.66
  6. Step 6: Final answer
    x = 398.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.