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Finding the Fourth Proportional to 553.44, 763.40 and 442.76

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Solution

The fourth proportional to 553.44, 763.40 and 442.76 is: 610.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.44 : 763.40 = 442.76 : x
  2. Step 2: Convert to fraction form
    553.44/763.40 = 442.76/x
  3. Step 3: Cross multiply
    553.44x = 763.40 × 442.76
  4. Step 4: Simplify right side
    553.44x = 338,002.98
  5. Step 5: Solve for x
    x = 338,002.98/553.44
  6. Step 6: Final answer
    x = 610.73

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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.