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Finding the Fourth Proportional to 339.54, 505.98 and 328.53

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Solution

The fourth proportional to 339.54, 505.98 and 328.53 is: 489.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.54 : 505.98 = 328.53 : x
  2. Step 2: Convert to fraction form
    339.54/505.98 = 328.53/x
  3. Step 3: Cross multiply
    339.54x = 505.98 × 328.53
  4. Step 4: Simplify right side
    339.54x = 166,229.61
  5. Step 5: Solve for x
    x = 166,229.61/339.54
  6. Step 6: Final answer
    x = 489.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.