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Finding the Fourth Proportional to 764.06, 1,145.29 and 353.46

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Solution

The fourth proportional to 764.06, 1,145.29 and 353.46 is: 529.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.06 : 1,145.29 = 353.46 : x
  2. Step 2: Convert to fraction form
    764.06/1,145.29 = 353.46/x
  3. Step 3: Cross multiply
    764.06x = 1,145.29 × 353.46
  4. Step 4: Simplify right side
    764.06x = 404,814.20
  5. Step 5: Solve for x
    x = 404,814.20/764.06
  6. Step 6: Final answer
    x = 529.82

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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.