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Finding the Fourth Proportional to 642.41, 886.61 and 362.75

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Solution

The fourth proportional to 642.41, 886.61 and 362.75 is: 500.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.41 : 886.61 = 362.75 : x
  2. Step 2: Convert to fraction form
    642.41/886.61 = 362.75/x
  3. Step 3: Cross multiply
    642.41x = 886.61 × 362.75
  4. Step 4: Simplify right side
    642.41x = 321,620.90
  5. Step 5: Solve for x
    x = 321,620.90/642.41
  6. Step 6: Final answer
    x = 500.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.