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Finding the Fourth Proportional to 309.97, 464.69 and 124.76

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Solution

The fourth proportional to 309.97, 464.69 and 124.76 is: 187.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.97 : 464.69 = 124.76 : x
  2. Step 2: Convert to fraction form
    309.97/464.69 = 124.76/x
  3. Step 3: Cross multiply
    309.97x = 464.69 × 124.76
  4. Step 4: Simplify right side
    309.97x = 57,974.72
  5. Step 5: Solve for x
    x = 57,974.72/309.97
  6. Step 6: Final answer
    x = 187.03

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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.