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Finding the Fourth Proportional to 274,916.80, 412,375.20 and 262,086.40

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Solution

The fourth proportional to 274,916.80, 412,375.20 and 262,086.40 is: 393,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,916.80 : 412,375.20 = 262,086.40 : x
  2. Step 2: Convert to fraction form
    274,916.80/412,375.20 = 262,086.40/x
  3. Step 3: Cross multiply
    274,916.80x = 412,375.20 × 262,086.40
  4. Step 4: Simplify right side
    274,916.80x = 108,077,931,617.28
  5. Step 5: Solve for x
    x = 108,077,931,617.28/274,916.80
  6. Step 6: Final answer
    x = 393,129.60

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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.