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Finding the Fourth Proportional to 289,136.70, 433,121.85 and 164,331.90

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Solution

The fourth proportional to 289,136.70, 433,121.85 and 164,331.90 is: 246,166.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,136.70 : 433,121.85 = 164,331.90 : x
  2. Step 2: Convert to fraction form
    289,136.70/433,121.85 = 164,331.90/x
  3. Step 3: Cross multiply
    289,136.70x = 433,121.85 × 164,331.90
  4. Step 4: Simplify right side
    289,136.70x = 71,175,736,542.02
  5. Step 5: Solve for x
    x = 71,175,736,542.02/289,136.70
  6. Step 6: Final answer
    x = 246,166.39

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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.