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Finding the Fourth Proportional to 553.20, 763.40 and 304.52

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Solution

The fourth proportional to 553.20, 763.40 and 304.52 is: 420.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.20 : 763.40 = 304.52 : x
  2. Step 2: Convert to fraction form
    553.20/763.40 = 304.52/x
  3. Step 3: Cross multiply
    553.20x = 763.40 × 304.52
  4. Step 4: Simplify right side
    553.20x = 232,469.05
  5. Step 5: Solve for x
    x = 232,469.05/553.20
  6. Step 6: Final answer
    x = 420.23

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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.