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Finding the Fourth Proportional to 309.29, 464.02 and 126.64

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Solution

The fourth proportional to 309.29, 464.02 and 126.64 is: 189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.29 : 464.02 = 126.64 : x
  2. Step 2: Convert to fraction form
    309.29/464.02 = 126.64/x
  3. Step 3: Cross multiply
    309.29x = 464.02 × 126.64
  4. Step 4: Simplify right side
    309.29x = 58,762.27
  5. Step 5: Solve for x
    x = 58,762.27/309.29
  6. Step 6: Final answer
    x = 189.99

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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.