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Finding the Fourth Proportional to 664,721.82, 917,311.32 and 362,915.82

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Solution

The fourth proportional to 664,721.82, 917,311.32 and 362,915.82 is: 500,821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,721.82 : 917,311.32 = 362,915.82 : x
  2. Step 2: Convert to fraction form
    664,721.82/917,311.32 = 362,915.82/x
  3. Step 3: Cross multiply
    664,721.82x = 917,311.32 × 362,915.82
  4. Step 4: Simplify right side
    664,721.82x = 332,906,789,893.08
  5. Step 5: Solve for x
    x = 332,906,789,893.08/664,721.82
  6. Step 6: Final answer
    x = 500,821.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.