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Finding the Fourth Proportional to 346.32, 519.31 and 126.79

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Solution

The fourth proportional to 346.32, 519.31 and 126.79 is: 190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.32 : 519.31 = 126.79 : x
  2. Step 2: Convert to fraction form
    346.32/519.31 = 126.79/x
  3. Step 3: Cross multiply
    346.32x = 519.31 × 126.79
  4. Step 4: Simplify right side
    346.32x = 65,840.08
  5. Step 5: Solve for x
    x = 65,840.08/346.32
  6. Step 6: Final answer
    x = 190.12

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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.