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Finding the Fourth Proportional to 512.13, 767.51 and 203.81

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Solution

The fourth proportional to 512.13, 767.51 and 203.81 is: 305.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.13 : 767.51 = 203.81 : x
  2. Step 2: Convert to fraction form
    512.13/767.51 = 203.81/x
  3. Step 3: Cross multiply
    512.13x = 767.51 × 203.81
  4. Step 4: Simplify right side
    512.13x = 156,426.21
  5. Step 5: Solve for x
    x = 156,426.21/512.13
  6. Step 6: Final answer
    x = 305.44

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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.