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Finding the Fourth Proportional to 221.34, 303.98 and 188.70

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Solution

The fourth proportional to 221.34, 303.98 and 188.70 is: 259.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.34 : 303.98 = 188.70 : x
  2. Step 2: Convert to fraction form
    221.34/303.98 = 188.70/x
  3. Step 3: Cross multiply
    221.34x = 303.98 × 188.70
  4. Step 4: Simplify right side
    221.34x = 57,360.08
  5. Step 5: Solve for x
    x = 57,360.08/221.34
  6. Step 6: Final answer
    x = 259.15

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.