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Finding the Fourth Proportional to 492,844.80, 739,612.80 and 212,563.20

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Solution

The fourth proportional to 492,844.80, 739,612.80 and 212,563.20 is: 318,993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,844.80 : 739,612.80 = 212,563.20 : x
  2. Step 2: Convert to fraction form
    492,844.80/739,612.80 = 212,563.20/x
  3. Step 3: Cross multiply
    492,844.80x = 739,612.80 × 212,563.20
  4. Step 4: Simplify right side
    492,844.80x = 157,214,463,528.96
  5. Step 5: Solve for x
    x = 157,214,463,528.96/492,844.80
  6. Step 6: Final answer
    x = 318,993.86

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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.