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Finding the Fourth Proportional to 552.31, 762.23 and 303.68

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Solution

The fourth proportional to 552.31, 762.23 and 303.68 is: 419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.31 : 762.23 = 303.68 : x
  2. Step 2: Convert to fraction form
    552.31/762.23 = 303.68/x
  3. Step 3: Cross multiply
    552.31x = 762.23 × 303.68
  4. Step 4: Simplify right side
    552.31x = 231,470.95
  5. Step 5: Solve for x
    x = 231,470.95/552.31
  6. Step 6: Final answer
    x = 419.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.