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Finding the Fourth Proportional to 641.17, 961.27 and 352.69

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Solution

The fourth proportional to 641.17, 961.27 and 352.69 is: 528.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.17 : 961.27 = 352.69 : x
  2. Step 2: Convert to fraction form
    641.17/961.27 = 352.69/x
  3. Step 3: Cross multiply
    641.17x = 961.27 × 352.69
  4. Step 4: Simplify right side
    641.17x = 339,030.32
  5. Step 5: Solve for x
    x = 339,030.32/641.17
  6. Step 6: Final answer
    x = 528.77

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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.