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Finding the Fourth Proportional to 511.24, 766.96 and 280.12

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Solution

The fourth proportional to 511.24, 766.96 and 280.12 is: 420.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.24 : 766.96 = 280.12 : x
  2. Step 2: Convert to fraction form
    511.24/766.96 = 280.12/x
  3. Step 3: Cross multiply
    511.24x = 766.96 × 280.12
  4. Step 4: Simplify right side
    511.24x = 214,840.84
  5. Step 5: Solve for x
    x = 214,840.84/511.24
  6. Step 6: Final answer
    x = 420.23

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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.