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Finding the Fourth Proportional to 221.50, 330.35 and 203.32

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Solution

The fourth proportional to 221.50, 330.35 and 203.32 is: 303.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.50 : 330.35 = 203.32 : x
  2. Step 2: Convert to fraction form
    221.50/330.35 = 203.32/x
  3. Step 3: Cross multiply
    221.50x = 330.35 × 203.32
  4. Step 4: Simplify right side
    221.50x = 67,166.76
  5. Step 5: Solve for x
    x = 67,166.76/221.50
  6. Step 6: Final answer
    x = 303.24

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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.