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Finding the Fourth Proportional to 764.44, 1,145.85 and 533.39

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Solution

The fourth proportional to 764.44, 1,145.85 and 533.39 is: 799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.44 : 1,145.85 = 533.39 : x
  2. Step 2: Convert to fraction form
    764.44/1,145.85 = 533.39/x
  3. Step 3: Cross multiply
    764.44x = 1,145.85 × 533.39
  4. Step 4: Simplify right side
    764.44x = 611,177.20
  5. Step 5: Solve for x
    x = 611,177.20/764.44
  6. Step 6: Final answer
    x = 799.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.