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Finding the Fourth Proportional to 314.30, 433.40 and 220.89

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Solution

The fourth proportional to 314.30, 433.40 and 220.89 is: 304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.30 : 433.40 = 220.89 : x
  2. Step 2: Convert to fraction form
    314.30/433.40 = 220.89/x
  3. Step 3: Cross multiply
    314.30x = 433.40 × 220.89
  4. Step 4: Simplify right side
    314.30x = 95,735.49
  5. Step 5: Solve for x
    x = 95,735.49/314.30
  6. Step 6: Final answer
    x = 304.60

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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.