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Finding the Fourth Proportional to 314.85, 434.50 and 190.49

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Solution

The fourth proportional to 314.85, 434.50 and 190.49 is: 262.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.85 : 434.50 = 190.49 : x
  2. Step 2: Convert to fraction form
    314.85/434.50 = 190.49/x
  3. Step 3: Cross multiply
    314.85x = 434.50 × 190.49
  4. Step 4: Simplify right side
    314.85x = 82,767.91
  5. Step 5: Solve for x
    x = 82,767.91/314.85
  6. Step 6: Final answer
    x = 262.88

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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.