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Finding the Fourth Proportional to 764.01, 1,145.20 and 325.17

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Solution

The fourth proportional to 764.01, 1,145.20 and 325.17 is: 487.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.01 : 1,145.20 = 325.17 : x
  2. Step 2: Convert to fraction form
    764.01/1,145.20 = 325.17/x
  3. Step 3: Cross multiply
    764.01x = 1,145.20 × 325.17
  4. Step 4: Simplify right side
    764.01x = 372,384.68
  5. Step 5: Solve for x
    x = 372,384.68/764.01
  6. Step 6: Final answer
    x = 487.41

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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.