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Finding the Fourth Proportional to 642.44, 886.42 and 362.68

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Solution

The fourth proportional to 642.44, 886.42 and 362.68 is: 500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.44 : 886.42 = 362.68 : x
  2. Step 2: Convert to fraction form
    642.44/886.42 = 362.68/x
  3. Step 3: Cross multiply
    642.44x = 886.42 × 362.68
  4. Step 4: Simplify right side
    642.44x = 321,483.68
  5. Step 5: Solve for x
    x = 321,483.68/642.44
  6. Step 6: Final answer
    x = 500.41

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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.