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Finding the Fourth Proportional to 274,912.20, 412,368.30 and 212,627.40

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Solution

The fourth proportional to 274,912.20, 412,368.30 and 212,627.40 is: 318,941.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,912.20 : 412,368.30 = 212,627.40 : x
  2. Step 2: Convert to fraction form
    274,912.20/412,368.30 = 212,627.40/x
  3. Step 3: Cross multiply
    274,912.20x = 412,368.30 × 212,627.40
  4. Step 4: Simplify right side
    274,912.20x = 87,680,799,471.42
  5. Step 5: Solve for x
    x = 87,680,799,471.42/274,912.20
  6. Step 6: Final answer
    x = 318,941.10

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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.