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Finding the Fourth Proportional to 505.77, 758.63 and 231.81

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Solution

The fourth proportional to 505.77, 758.63 and 231.81 is: 347.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.77 : 758.63 = 231.81 : x
  2. Step 2: Convert to fraction form
    505.77/758.63 = 231.81/x
  3. Step 3: Cross multiply
    505.77x = 758.63 × 231.81
  4. Step 4: Simplify right side
    505.77x = 175,856.86
  5. Step 5: Solve for x
    x = 175,856.86/505.77
  6. Step 6: Final answer
    x = 347.70

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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.