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Finding the Fourth Proportional to 353,229.71, 487,469.79 and 202,355.87

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Solution

The fourth proportional to 353,229.71, 487,469.79 and 202,355.87 is: 279,258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,229.71 : 487,469.79 = 202,355.87 : x
  2. Step 2: Convert to fraction form
    353,229.71/487,469.79 = 202,355.87/x
  3. Step 3: Cross multiply
    353,229.71x = 487,469.79 × 202,355.87
  4. Step 4: Simplify right side
    353,229.71x = 98,642,371,016.82
  5. Step 5: Solve for x
    x = 98,642,371,016.82/353,229.71
  6. Step 6: Final answer
    x = 279,258.42

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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.