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Finding the Fourth Proportional to 636,434.57, 954,769.28 and 209,999.87

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Solution

The fourth proportional to 636,434.57, 954,769.28 and 209,999.87 is: 315,038.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,434.57 : 954,769.28 = 209,999.87 : x
  2. Step 2: Convert to fraction form
    636,434.57/954,769.28 = 209,999.87/x
  3. Step 3: Cross multiply
    636,434.57x = 954,769.28 × 209,999.87
  4. Step 4: Simplify right side
    636,434.57x = 200,501,419,906.15
  5. Step 5: Solve for x
    x = 200,501,419,906.15/636,434.57
  6. Step 6: Final answer
    x = 315,038.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.