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Finding the Fourth Proportional to 642.07, 886 and 362.31

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Solution

The fourth proportional to 642.07, 886 and 362.31 is: 499.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.07 : 886 = 362.31 : x
  2. Step 2: Convert to fraction form
    642.07/886 = 362.31/x
  3. Step 3: Cross multiply
    642.07x = 886 × 362.31
  4. Step 4: Simplify right side
    642.07x = 321,006.66
  5. Step 5: Solve for x
    x = 321,006.66/642.07
  6. Step 6: Final answer
    x = 499.96

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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.