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Finding the Fourth Proportional to 219.19, 328.95 and 193.56

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Solution

The fourth proportional to 219.19, 328.95 and 193.56 is: 290.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.19 : 328.95 = 193.56 : x
  2. Step 2: Convert to fraction form
    219.19/328.95 = 193.56/x
  3. Step 3: Cross multiply
    219.19x = 328.95 × 193.56
  4. Step 4: Simplify right side
    219.19x = 63,669.92
  5. Step 5: Solve for x
    x = 63,669.92/219.19
  6. Step 6: Final answer
    x = 290.48

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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.