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Finding the Fourth Proportional to 345.95, 519.19 and 140.66

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Solution

The fourth proportional to 345.95, 519.19 and 140.66 is: 211.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.95 : 519.19 = 140.66 : x
  2. Step 2: Convert to fraction form
    345.95/519.19 = 140.66/x
  3. Step 3: Cross multiply
    345.95x = 519.19 × 140.66
  4. Step 4: Simplify right side
    345.95x = 73,026.32
  5. Step 5: Solve for x
    x = 73,026.32/345.95
  6. Step 6: Final answer
    x = 211.09

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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.