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Finding the Fourth Proportional to 642.21, 886.26 and 362.46

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Solution

The fourth proportional to 642.21, 886.26 and 362.46 is: 500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.21 : 886.26 = 362.46 : x
  2. Step 2: Convert to fraction form
    642.21/886.26 = 362.46/x
  3. Step 3: Cross multiply
    642.21x = 886.26 × 362.46
  4. Step 4: Simplify right side
    642.21x = 321,231.46
  5. Step 5: Solve for x
    x = 321,231.46/642.21
  6. Step 6: Final answer
    x = 500.20

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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.