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Finding the Fourth Proportional to 642.46, 886.40 and 362.66

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Solution

The fourth proportional to 642.46, 886.40 and 362.66 is: 500.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.46 : 886.40 = 362.66 : x
  2. Step 2: Convert to fraction form
    642.46/886.40 = 362.66/x
  3. Step 3: Cross multiply
    642.46x = 886.40 × 362.66
  4. Step 4: Simplify right side
    642.46x = 321,461.82
  5. Step 5: Solve for x
    x = 321,461.82/642.46
  6. Step 6: Final answer
    x = 500.36

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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.