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Finding the Fourth Proportional to 872.80, 1,308.26 and 352.68

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Solution

The fourth proportional to 872.80, 1,308.26 and 352.68 is: 528.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.80 : 1,308.26 = 352.68 : x
  2. Step 2: Convert to fraction form
    872.80/1,308.26 = 352.68/x
  3. Step 3: Cross multiply
    872.80x = 1,308.26 × 352.68
  4. Step 4: Simplify right side
    872.80x = 461,397.14
  5. Step 5: Solve for x
    x = 461,397.14/872.80
  6. Step 6: Final answer
    x = 528.64

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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.