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Finding the Fourth Proportional to 436.49, 601.99 and 289.16

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Solution

The fourth proportional to 436.49, 601.99 and 289.16 is: 398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.49 : 601.99 = 289.16 : x
  2. Step 2: Convert to fraction form
    436.49/601.99 = 289.16/x
  3. Step 3: Cross multiply
    436.49x = 601.99 × 289.16
  4. Step 4: Simplify right side
    436.49x = 174,067.70
  5. Step 5: Solve for x
    x = 174,067.70/436.49
  6. Step 6: Final answer
    x = 398.79

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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.