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Finding the Fourth Proportional to 508.68, 764.28 and 422.64

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Solution

The fourth proportional to 508.68, 764.28 and 422.64 is: 635.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.68 : 764.28 = 422.64 : x
  2. Step 2: Convert to fraction form
    508.68/764.28 = 422.64/x
  3. Step 3: Cross multiply
    508.68x = 764.28 × 422.64
  4. Step 4: Simplify right side
    508.68x = 323,015.30
  5. Step 5: Solve for x
    x = 323,015.30/508.68
  6. Step 6: Final answer
    x = 635.01

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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.