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Finding the Fourth Proportional to 639.98, 882.53 and 605.29

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Solution

The fourth proportional to 639.98, 882.53 and 605.29 is: 834.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.98 : 882.53 = 605.29 : x
  2. Step 2: Convert to fraction form
    639.98/882.53 = 605.29/x
  3. Step 3: Cross multiply
    639.98x = 882.53 × 605.29
  4. Step 4: Simplify right side
    639.98x = 534,186.58
  5. Step 5: Solve for x
    x = 534,186.58/639.98
  6. Step 6: Final answer
    x = 834.69

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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.