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Finding the Fourth Proportional to 494.13, 740.75 and 320.87

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Solution

The fourth proportional to 494.13, 740.75 and 320.87 is: 481.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.13 : 740.75 = 320.87 : x
  2. Step 2: Convert to fraction form
    494.13/740.75 = 320.87/x
  3. Step 3: Cross multiply
    494.13x = 740.75 × 320.87
  4. Step 4: Simplify right side
    494.13x = 237,679.14
  5. Step 5: Solve for x
    x = 237,679.14/494.13
  6. Step 6: Final answer
    x = 481.01

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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.