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Finding the Fourth Proportional to 639.98, 883.23 and 360.29

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Solution

The fourth proportional to 639.98, 883.23 and 360.29 is: 497.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.98 : 883.23 = 360.29 : x
  2. Step 2: Convert to fraction form
    639.98/883.23 = 360.29/x
  3. Step 3: Cross multiply
    639.98x = 883.23 × 360.29
  4. Step 4: Simplify right side
    639.98x = 318,218.94
  5. Step 5: Solve for x
    x = 318,218.94/639.98
  6. Step 6: Final answer
    x = 497.23

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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.