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Finding the Fourth Proportional to 415,661.43, 623,576.59 and 131,396.39

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Solution

The fourth proportional to 415,661.43, 623,576.59 and 131,396.39 is: 197,121.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,661.43 : 623,576.59 = 131,396.39 : x
  2. Step 2: Convert to fraction form
    415,661.43/623,576.59 = 131,396.39/x
  3. Step 3: Cross multiply
    415,661.43x = 623,576.59 × 131,396.39
  4. Step 4: Simplify right side
    415,661.43x = 81,935,709,368.14
  5. Step 5: Solve for x
    x = 81,935,709,368.14/415,661.43
  6. Step 6: Final answer
    x = 197,121.27

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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.