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Finding the Fourth Proportional to 552.57, 762.55 and 303.90

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Solution

The fourth proportional to 552.57, 762.55 and 303.90 is: 419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.57 : 762.55 = 303.90 : x
  2. Step 2: Convert to fraction form
    552.57/762.55 = 303.90/x
  3. Step 3: Cross multiply
    552.57x = 762.55 × 303.90
  4. Step 4: Simplify right side
    552.57x = 231,738.95
  5. Step 5: Solve for x
    x = 231,738.95/552.57
  6. Step 6: Final answer
    x = 419.38

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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.