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Finding the Fourth Proportional to 346.38, 519.58 and 140.90

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Solution

The fourth proportional to 346.38, 519.58 and 140.90 is: 211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.38 : 519.58 = 140.90 : x
  2. Step 2: Convert to fraction form
    346.38/519.58 = 140.90/x
  3. Step 3: Cross multiply
    346.38x = 519.58 × 140.90
  4. Step 4: Simplify right side
    346.38x = 73,207.82
  5. Step 5: Solve for x
    x = 73,207.82/346.38
  6. Step 6: Final answer
    x = 211.35

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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.