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Finding the Fourth Proportional to 641.56, 961.38 and 526.82

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Solution

The fourth proportional to 641.56, 961.38 and 526.82 is: 789.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.56 : 961.38 = 526.82 : x
  2. Step 2: Convert to fraction form
    641.56/961.38 = 526.82/x
  3. Step 3: Cross multiply
    641.56x = 961.38 × 526.82
  4. Step 4: Simplify right side
    641.56x = 506,474.21
  5. Step 5: Solve for x
    x = 506,474.21/641.56
  6. Step 6: Final answer
    x = 789.44

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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.