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Finding the Fourth Proportional to 314.30, 433.53 and 189.86

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Solution

The fourth proportional to 314.30, 433.53 and 189.86 is: 261.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.30 : 433.53 = 189.86 : x
  2. Step 2: Convert to fraction form
    314.30/433.53 = 189.86/x
  3. Step 3: Cross multiply
    314.30x = 433.53 × 189.86
  4. Step 4: Simplify right side
    314.30x = 82,307.84
  5. Step 5: Solve for x
    x = 82,307.84/314.30
  6. Step 6: Final answer
    x = 261.88

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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.