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Finding the Fourth Proportional to 215,898.40, 323,847.60 and 211,751.20

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Solution

The fourth proportional to 215,898.40, 323,847.60 and 211,751.20 is: 317,626.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,898.40 : 323,847.60 = 211,751.20 : x
  2. Step 2: Convert to fraction form
    215,898.40/323,847.60 = 211,751.20/x
  3. Step 3: Cross multiply
    215,898.40x = 323,847.60 × 211,751.20
  4. Step 4: Simplify right side
    215,898.40x = 68,575,117,917.12
  5. Step 5: Solve for x
    x = 68,575,117,917.12/215,898.40
  6. Step 6: Final answer
    x = 317,626.80

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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.