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Finding the Fourth Proportional to 221,238.40, 331,857.60 and 201,992.80

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Solution

The fourth proportional to 221,238.40, 331,857.60 and 201,992.80 is: 302,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,238.40 : 331,857.60 = 201,992.80 : x
  2. Step 2: Convert to fraction form
    221,238.40/331,857.60 = 201,992.80/x
  3. Step 3: Cross multiply
    221,238.40x = 331,857.60 × 201,992.80
  4. Step 4: Simplify right side
    221,238.40x = 67,032,845,825.28
  5. Step 5: Solve for x
    x = 67,032,845,825.28/221,238.40
  6. Step 6: Final answer
    x = 302,989.20

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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.