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Finding the Fourth Proportional to 268,136.20, 401,621.10 and 215,648.20

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Solution

The fourth proportional to 268,136.20, 401,621.10 and 215,648.20 is: 323,003.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,136.20 : 401,621.10 = 215,648.20 : x
  2. Step 2: Convert to fraction form
    268,136.20/401,621.10 = 215,648.20/x
  3. Step 3: Cross multiply
    268,136.20x = 401,621.10 × 215,648.20
  4. Step 4: Simplify right side
    268,136.20x = 86,608,867,297.02
  5. Step 5: Solve for x
    x = 86,608,867,297.02/268,136.20
  6. Step 6: Final answer
    x = 323,003.26

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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.