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Finding the Fourth Proportional to 639,379.05, 882,341.31 and 352,897.17

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Solution

The fourth proportional to 639,379.05, 882,341.31 and 352,897.17 is: 486,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,379.05 : 882,341.31 = 352,897.17 : x
  2. Step 2: Convert to fraction form
    639,379.05/882,341.31 = 352,897.17/x
  3. Step 3: Cross multiply
    639,379.05x = 882,341.31 × 352,897.17
  4. Step 4: Simplify right side
    639,379.05x = 311,375,751,273.09
  5. Step 5: Solve for x
    x = 311,375,751,273.09/639,379.05
  6. Step 6: Final answer
    x = 486,997.11

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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.