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Finding the Fourth Proportional to 511.20, 766.65 and 203.00

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Solution

The fourth proportional to 511.20, 766.65 and 203.00 is: 304.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.20 : 766.65 = 203.00 : x
  2. Step 2: Convert to fraction form
    511.20/766.65 = 203.00/x
  3. Step 3: Cross multiply
    511.20x = 766.65 × 203.00
  4. Step 4: Simplify right side
    511.20x = 155,626.12
  5. Step 5: Solve for x
    x = 155,626.12/511.20
  6. Step 6: Final answer
    x = 304.43

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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.