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Finding the Fourth Proportional to 435.26, 651.63 and 338.78

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Solution

The fourth proportional to 435.26, 651.63 and 338.78 is: 507.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.26 : 651.63 = 338.78 : x
  2. Step 2: Convert to fraction form
    435.26/651.63 = 338.78/x
  3. Step 3: Cross multiply
    435.26x = 651.63 × 338.78
  4. Step 4: Simplify right side
    435.26x = 220,759.21
  5. Step 5: Solve for x
    x = 220,759.21/435.26
  6. Step 6: Final answer
    x = 507.19

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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.