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Finding the Fourth Proportional to 350.58, 523.28 and 321.72

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Solution

The fourth proportional to 350.58, 523.28 and 321.72 is: 480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.58 : 523.28 = 321.72 : x
  2. Step 2: Convert to fraction form
    350.58/523.28 = 321.72/x
  3. Step 3: Cross multiply
    350.58x = 523.28 × 321.72
  4. Step 4: Simplify right side
    350.58x = 168,349.64
  5. Step 5: Solve for x
    x = 168,349.64/350.58
  6. Step 6: Final answer
    x = 480.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.