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Finding the Fourth Proportional to 216,388.70, 323,999.85 and 156,902.30

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Solution

The fourth proportional to 216,388.70, 323,999.85 and 156,902.30 is: 234,930.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,388.70 : 323,999.85 = 156,902.30 : x
  2. Step 2: Convert to fraction form
    216,388.70/323,999.85 = 156,902.30/x
  3. Step 3: Cross multiply
    216,388.70x = 323,999.85 × 156,902.30
  4. Step 4: Simplify right side
    216,388.70x = 50,836,321,664.66
  5. Step 5: Solve for x
    x = 50,836,321,664.66/216,388.70
  6. Step 6: Final answer
    x = 234,930.57

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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.