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Finding the Fourth Proportional to 217,876.70, 326,815.05 and 164,999.90

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Solution

The fourth proportional to 217,876.70, 326,815.05 and 164,999.90 is: 247,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,876.70 : 326,815.05 = 164,999.90 : x
  2. Step 2: Convert to fraction form
    217,876.70/326,815.05 = 164,999.90/x
  3. Step 3: Cross multiply
    217,876.70x = 326,815.05 × 164,999.90
  4. Step 4: Simplify right side
    217,876.70x = 53,924,450,568.50
  5. Step 5: Solve for x
    x = 53,924,450,568.50/217,876.70
  6. Step 6: Final answer
    x = 247,499.85

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1.5x scale

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.