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Finding the Fourth Proportional to 219.20, 328.86 and 157.58

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Solution

The fourth proportional to 219.20, 328.86 and 157.58 is: 236.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.20 : 328.86 = 157.58 : x
  2. Step 2: Convert to fraction form
    219.20/328.86 = 157.58/x
  3. Step 3: Cross multiply
    219.20x = 328.86 × 157.58
  4. Step 4: Simplify right side
    219.20x = 51,821.76
  5. Step 5: Solve for x
    x = 51,821.76/219.20
  6. Step 6: Final answer
    x = 236.41

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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.