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Finding the Fourth Proportional to 212,885.20, 319,327.80 and 202,517.20

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Solution

The fourth proportional to 212,885.20, 319,327.80 and 202,517.20 is: 303,775.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,885.20 : 319,327.80 = 202,517.20 : x
  2. Step 2: Convert to fraction form
    212,885.20/319,327.80 = 202,517.20/x
  3. Step 3: Cross multiply
    212,885.20x = 319,327.80 × 202,517.20
  4. Step 4: Simplify right side
    212,885.20x = 64,669,371,938.16
  5. Step 5: Solve for x
    x = 64,669,371,938.16/212,885.20
  6. Step 6: Final answer
    x = 303,775.80

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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.