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Finding the Fourth Proportional to 552.15, 761.95 and 303.45

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Solution

The fourth proportional to 552.15, 761.95 and 303.45 is: 418.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.15 : 761.95 = 303.45 : x
  2. Step 2: Convert to fraction form
    552.15/761.95 = 303.45/x
  3. Step 3: Cross multiply
    552.15x = 761.95 × 303.45
  4. Step 4: Simplify right side
    552.15x = 231,214.25
  5. Step 5: Solve for x
    x = 231,214.25/552.15
  6. Step 6: Final answer
    x = 418.75

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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.