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Finding the Fourth Proportional to 761.28, 1,141.44 and 350.48

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Solution

The fourth proportional to 761.28, 1,141.44 and 350.48 is: 525.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.28 : 1,141.44 = 350.48 : x
  2. Step 2: Convert to fraction form
    761.28/1,141.44 = 350.48/x
  3. Step 3: Cross multiply
    761.28x = 1,141.44 × 350.48
  4. Step 4: Simplify right side
    761.28x = 400,046.18
  5. Step 5: Solve for x
    x = 400,046.18/761.28
  6. Step 6: Final answer
    x = 525.49

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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.