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Finding the Fourth Proportional to 639, 882.18 and 484.02

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Solution

The fourth proportional to 639, 882.18 and 484.02 is: 668.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639 : 882.18 = 484.02 : x
  2. Step 2: Convert to fraction form
    639/882.18 = 484.02/x
  3. Step 3: Cross multiply
    639x = 882.18 × 484.02
  4. Step 4: Simplify right side
    639x = 426,992.76
  5. Step 5: Solve for x
    x = 426,992.76/639
  6. Step 6: Final answer
    x = 668.22

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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.