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Finding the Fourth Proportional to 506.08, 758.98 and 140.78

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Solution

The fourth proportional to 506.08, 758.98 and 140.78 is: 211.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.08 : 758.98 = 140.78 : x
  2. Step 2: Convert to fraction form
    506.08/758.98 = 140.78/x
  3. Step 3: Cross multiply
    506.08x = 758.98 × 140.78
  4. Step 4: Simplify right side
    506.08x = 106,850.75
  5. Step 5: Solve for x
    x = 106,850.75/506.08
  6. Step 6: Final answer
    x = 211.14

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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.