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Finding the Fourth Proportional to 438.72, 659.67 and 335.29

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Solution

The fourth proportional to 438.72, 659.67 and 335.29 is: 504.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.72 : 659.67 = 335.29 : x
  2. Step 2: Convert to fraction form
    438.72/659.67 = 335.29/x
  3. Step 3: Cross multiply
    438.72x = 659.67 × 335.29
  4. Step 4: Simplify right side
    438.72x = 221,180.03
  5. Step 5: Solve for x
    x = 221,180.03/438.72
  6. Step 6: Final answer
    x = 504.15

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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.