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Finding the Fourth Proportional to 314.34, 433.51 and 221.05

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Solution

The fourth proportional to 314.34, 433.51 and 221.05 is: 304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.34 : 433.51 = 221.05 : x
  2. Step 2: Convert to fraction form
    314.34/433.51 = 221.05/x
  3. Step 3: Cross multiply
    314.34x = 433.51 × 221.05
  4. Step 4: Simplify right side
    314.34x = 95,827.39
  5. Step 5: Solve for x
    x = 95,827.39/314.34
  6. Step 6: Final answer
    x = 304.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.