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Finding the Fourth Proportional to 215,600.60, 323,400.90 and 209,456.60

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Solution

The fourth proportional to 215,600.60, 323,400.90 and 209,456.60 is: 314,184.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,600.60 : 323,400.90 = 209,456.60 : x
  2. Step 2: Convert to fraction form
    215,600.60/323,400.90 = 209,456.60/x
  3. Step 3: Cross multiply
    215,600.60x = 323,400.90 × 209,456.60
  4. Step 4: Simplify right side
    215,600.60x = 67,738,452,950.94
  5. Step 5: Solve for x
    x = 67,738,452,950.94/215,600.60
  6. Step 6: Final answer
    x = 314,184.90

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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.