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Finding the Fourth Proportional to 221.68, 332.48 and 210.70

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Solution

The fourth proportional to 221.68, 332.48 and 210.70 is: 316.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.68 : 332.48 = 210.70 : x
  2. Step 2: Convert to fraction form
    221.68/332.48 = 210.70/x
  3. Step 3: Cross multiply
    221.68x = 332.48 × 210.70
  4. Step 4: Simplify right side
    221.68x = 70,052.48
  5. Step 5: Solve for x
    x = 70,052.48/221.68
  6. Step 6: Final answer
    x = 316.01

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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.