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Finding the Fourth Proportional to 313.34, 469.49 and 221.61

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Solution

The fourth proportional to 313.34, 469.49 and 221.61 is: 332.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.34 : 469.49 = 221.61 : x
  2. Step 2: Convert to fraction form
    313.34/469.49 = 221.61/x
  3. Step 3: Cross multiply
    313.34x = 469.49 × 221.61
  4. Step 4: Simplify right side
    313.34x = 104,043.68
  5. Step 5: Solve for x
    x = 104,043.68/313.34
  6. Step 6: Final answer
    x = 332.05

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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.