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Finding the Fourth Proportional to 269,197.20, 403,342.20 and 212,821.20

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Solution

The fourth proportional to 269,197.20, 403,342.20 and 212,821.20 is: 318,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,197.20 : 403,342.20 = 212,821.20 : x
  2. Step 2: Convert to fraction form
    269,197.20/403,342.20 = 212,821.20/x
  3. Step 3: Cross multiply
    269,197.20x = 403,342.20 × 212,821.20
  4. Step 4: Simplify right side
    269,197.20x = 85,839,771,014.64
  5. Step 5: Solve for x
    x = 85,839,771,014.64/269,197.20
  6. Step 6: Final answer
    x = 318,873.19

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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.