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Finding the Fourth Proportional to 639,523.87, 882,545.76 and 353,046.31

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Solution

The fourth proportional to 639,523.87, 882,545.76 and 353,046.31 is: 487,205.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,523.87 : 882,545.76 = 353,046.31 : x
  2. Step 2: Convert to fraction form
    639,523.87/882,545.76 = 353,046.31/x
  3. Step 3: Cross multiply
    639,523.87x = 882,545.76 × 353,046.31
  4. Step 4: Simplify right side
    639,523.87x = 311,579,517,796.19
  5. Step 5: Solve for x
    x = 311,579,517,796.19/639,523.87
  6. Step 6: Final answer
    x = 487,205.46

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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.