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Finding the Fourth Proportional to 664,676.01, 996,915.46 and 215,436.51

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Solution

The fourth proportional to 664,676.01, 996,915.46 and 215,436.51 is: 323,122.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,676.01 : 996,915.46 = 215,436.51 : x
  2. Step 2: Convert to fraction form
    664,676.01/996,915.46 = 215,436.51/x
  3. Step 3: Cross multiply
    664,676.01x = 996,915.46 × 215,436.51
  4. Step 4: Simplify right side
    664,676.01x = 214,771,987,467.45
  5. Step 5: Solve for x
    x = 214,771,987,467.45/664,676.01
  6. Step 6: Final answer
    x = 323,122.82

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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.