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Finding the Fourth Proportional to 356.98, 535.47 and 219.61

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Solution

The fourth proportional to 356.98, 535.47 and 219.61 is: 329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.98 : 535.47 = 219.61 : x
  2. Step 2: Convert to fraction form
    356.98/535.47 = 219.61/x
  3. Step 3: Cross multiply
    356.98x = 535.47 × 219.61
  4. Step 4: Simplify right side
    356.98x = 117,595.96
  5. Step 5: Solve for x
    x = 117,595.96/356.98
  6. Step 6: Final answer
    x = 329.42

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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.