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Finding the Fourth Proportional to 387.09, 532.89 and 335.36

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Solution

The fourth proportional to 387.09, 532.89 and 335.36 is: 461.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.09 : 532.89 = 335.36 : x
  2. Step 2: Convert to fraction form
    387.09/532.89 = 335.36/x
  3. Step 3: Cross multiply
    387.09x = 532.89 × 335.36
  4. Step 4: Simplify right side
    387.09x = 178,705.65
  5. Step 5: Solve for x
    x = 178,705.65/387.09
  6. Step 6: Final answer
    x = 461.66

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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.