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Finding the Fourth Proportional to 346.11, 519.21 and 140.69

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Solution

The fourth proportional to 346.11, 519.21 and 140.69 is: 211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.11 : 519.21 = 140.69 : x
  2. Step 2: Convert to fraction form
    346.11/519.21 = 140.69/x
  3. Step 3: Cross multiply
    346.11x = 519.21 × 140.69
  4. Step 4: Simplify right side
    346.11x = 73,045.06
  5. Step 5: Solve for x
    x = 73,045.06/346.11
  6. Step 6: Final answer
    x = 211.05

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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.