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Finding the Fourth Proportional to 217,427.80, 326,141.70 and 164,939.80

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Solution

The fourth proportional to 217,427.80, 326,141.70 and 164,939.80 is: 247,409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,427.80 : 326,141.70 = 164,939.80 : x
  2. Step 2: Convert to fraction form
    217,427.80/326,141.70 = 164,939.80/x
  3. Step 3: Cross multiply
    217,427.80x = 326,141.70 × 164,939.80
  4. Step 4: Simplify right side
    217,427.80x = 53,793,746,769.66
  5. Step 5: Solve for x
    x = 53,793,746,769.66/217,427.80
  6. Step 6: Final answer
    x = 247,409.70

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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.