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Finding the Fourth Proportional to 511.15, 766.73 and 145.94

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Solution

The fourth proportional to 511.15, 766.73 and 145.94 is: 218.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.15 : 766.73 = 145.94 : x
  2. Step 2: Convert to fraction form
    511.15/766.73 = 145.94/x
  3. Step 3: Cross multiply
    511.15x = 766.73 × 145.94
  4. Step 4: Simplify right side
    511.15x = 111,898.61
  5. Step 5: Solve for x
    x = 111,898.61/511.15
  6. Step 6: Final answer
    x = 218.91

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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.