Home / 1,243.11-1,864.80-512.28

Finding the Fourth Proportional to 1,243.11, 1,864.80 and 512.28

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Solution

The fourth proportional to 1,243.11, 1,864.80 and 512.28 is: 768.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.11 : 1,864.80 = 512.28 : x
  2. Step 2: Convert to fraction form
    1,243.11/1,864.80 = 512.28/x
  3. Step 3: Cross multiply
    1,243.11x = 1,864.80 × 512.28
  4. Step 4: Simplify right side
    1,243.11x = 955,299.74
  5. Step 5: Solve for x
    x = 955,299.74/1,243.11
  6. Step 6: Final answer
    x = 768.48

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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.