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Finding the Fourth Proportional to 218,945.60, 328,418.40 and 201,230.90

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Solution

The fourth proportional to 218,945.60, 328,418.40 and 201,230.90 is: 301,846.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,945.60 : 328,418.40 = 201,230.90 : x
  2. Step 2: Convert to fraction form
    218,945.60/328,418.40 = 201,230.90/x
  3. Step 3: Cross multiply
    218,945.60x = 328,418.40 × 201,230.90
  4. Step 4: Simplify right side
    218,945.60x = 66,087,930,208.56
  5. Step 5: Solve for x
    x = 66,087,930,208.56/218,945.60
  6. Step 6: Final answer
    x = 301,846.35

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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.