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Finding the Fourth Proportional to 306.26, 458.70 and 190.76

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Solution

The fourth proportional to 306.26, 458.70 and 190.76 is: 285.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.26 : 458.70 = 190.76 : x
  2. Step 2: Convert to fraction form
    306.26/458.70 = 190.76/x
  3. Step 3: Cross multiply
    306.26x = 458.70 × 190.76
  4. Step 4: Simplify right side
    306.26x = 87,501.61
  5. Step 5: Solve for x
    x = 87,501.61/306.26
  6. Step 6: Final answer
    x = 285.71

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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.