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Finding the Fourth Proportional to 351,489.60, 485,073.30 and 206,301.66

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Solution

The fourth proportional to 351,489.60, 485,073.30 and 206,301.66 is: 284,706.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,489.60 : 485,073.30 = 206,301.66 : x
  2. Step 2: Convert to fraction form
    351,489.60/485,073.30 = 206,301.66/x
  3. Step 3: Cross multiply
    351,489.60x = 485,073.30 × 206,301.66
  4. Step 4: Simplify right side
    351,489.60x = 100,071,427,011.68
  5. Step 5: Solve for x
    x = 100,071,427,011.68/351,489.60
  6. Step 6: Final answer
    x = 284,706.65

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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.