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Finding the Fourth Proportional to 505.22, 758.39 and 261.95

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Solution

The fourth proportional to 505.22, 758.39 and 261.95 is: 393.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.22 : 758.39 = 261.95 : x
  2. Step 2: Convert to fraction form
    505.22/758.39 = 261.95/x
  3. Step 3: Cross multiply
    505.22x = 758.39 × 261.95
  4. Step 4: Simplify right side
    505.22x = 198,655.16
  5. Step 5: Solve for x
    x = 198,655.16/505.22
  6. Step 6: Final answer
    x = 393.21

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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.