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Finding the Fourth Proportional to 505.85, 758.76 and 159.20

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Solution

The fourth proportional to 505.85, 758.76 and 159.20 is: 238.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.85 : 758.76 = 159.20 : x
  2. Step 2: Convert to fraction form
    505.85/758.76 = 159.20/x
  3. Step 3: Cross multiply
    505.85x = 758.76 × 159.20
  4. Step 4: Simplify right side
    505.85x = 120,790.00
  5. Step 5: Solve for x
    x = 120,790.00/505.85
  6. Step 6: Final answer
    x = 238.79

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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.