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Finding the Fourth Proportional to 639.18, 882.02 and 359.46

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Solution

The fourth proportional to 639.18, 882.02 and 359.46 is: 496.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.18 : 882.02 = 359.46 : x
  2. Step 2: Convert to fraction form
    639.18/882.02 = 359.46/x
  3. Step 3: Cross multiply
    639.18x = 882.02 × 359.46
  4. Step 4: Simplify right side
    639.18x = 317,051.81
  5. Step 5: Solve for x
    x = 317,051.81/639.18
  6. Step 6: Final answer
    x = 496.03

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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.