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Finding the Fourth Proportional to 438.29, 604.83 and 261.33

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Solution

The fourth proportional to 438.29, 604.83 and 261.33 is: 360.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.29 : 604.83 = 261.33 : x
  2. Step 2: Convert to fraction form
    438.29/604.83 = 261.33/x
  3. Step 3: Cross multiply
    438.29x = 604.83 × 261.33
  4. Step 4: Simplify right side
    438.29x = 158,060.22
  5. Step 5: Solve for x
    x = 158,060.22/438.29
  6. Step 6: Final answer
    x = 360.63

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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.