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Finding the Fourth Proportional to 319.23, 478.82 and 124.29

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Solution

The fourth proportional to 319.23, 478.82 and 124.29 is: 186.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.23 : 478.82 = 124.29 : x
  2. Step 2: Convert to fraction form
    319.23/478.82 = 124.29/x
  3. Step 3: Cross multiply
    319.23x = 478.82 × 124.29
  4. Step 4: Simplify right side
    319.23x = 59,512.85
  5. Step 5: Solve for x
    x = 59,512.85/319.23
  6. Step 6: Final answer
    x = 186.43

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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.