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Finding the Fourth Proportional to 215,999.60, 323,999.40 and 206,158.10

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Solution

The fourth proportional to 215,999.60, 323,999.40 and 206,158.10 is: 309,237.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.60 : 323,999.40 = 206,158.10 : x
  2. Step 2: Convert to fraction form
    215,999.60/323,999.40 = 206,158.10/x
  3. Step 3: Cross multiply
    215,999.60x = 323,999.40 × 206,158.10
  4. Step 4: Simplify right side
    215,999.60x = 66,795,100,705.14
  5. Step 5: Solve for x
    x = 66,795,100,705.14/215,999.60
  6. Step 6: Final answer
    x = 309,237.15

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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.