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Finding the Fourth Proportional to 492,778.80, 739,168.20 and 442,915.20

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Solution

The fourth proportional to 492,778.80, 739,168.20 and 442,915.20 is: 664,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,778.80 : 739,168.20 = 442,915.20 : x
  2. Step 2: Convert to fraction form
    492,778.80/739,168.20 = 442,915.20/x
  3. Step 3: Cross multiply
    492,778.80x = 739,168.20 × 442,915.20
  4. Step 4: Simplify right side
    492,778.80x = 327,388,831,136.64
  5. Step 5: Solve for x
    x = 327,388,831,136.64/492,778.80
  6. Step 6: Final answer
    x = 664,372.80

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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.