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Finding the Fourth Proportional to 511.28, 766.76 and 186.58

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Solution

The fourth proportional to 511.28, 766.76 and 186.58 is: 279.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.28 : 766.76 = 186.58 : x
  2. Step 2: Convert to fraction form
    511.28/766.76 = 186.58/x
  3. Step 3: Cross multiply
    511.28x = 766.76 × 186.58
  4. Step 4: Simplify right side
    511.28x = 143,062.08
  5. Step 5: Solve for x
    x = 143,062.08/511.28
  6. Step 6: Final answer
    x = 279.81

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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.