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Finding the Fourth Proportional to 413,872.40, 620,916.60 and 133,396.40

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Solution

The fourth proportional to 413,872.40, 620,916.60 and 133,396.40 is: 200,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,872.40 : 620,916.60 = 133,396.40 : x
  2. Step 2: Convert to fraction form
    413,872.40/620,916.60 = 133,396.40/x
  3. Step 3: Cross multiply
    413,872.40x = 620,916.60 × 133,396.40
  4. Step 4: Simplify right side
    413,872.40x = 82,828,039,140.24
  5. Step 5: Solve for x
    x = 82,828,039,140.24/413,872.40
  6. Step 6: Final answer
    x = 200,129.41

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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.