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Finding the Fourth Proportional to 379,028.85, 523,105.68 and 215,725.06

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Solution

The fourth proportional to 379,028.85, 523,105.68 and 215,725.06 is: 297,726.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,028.85 : 523,105.68 = 215,725.06 : x
  2. Step 2: Convert to fraction form
    379,028.85/523,105.68 = 215,725.06/x
  3. Step 3: Cross multiply
    379,028.85x = 523,105.68 × 215,725.06
  4. Step 4: Simplify right side
    379,028.85x = 112,847,004,204.34
  5. Step 5: Solve for x
    x = 112,847,004,204.34/379,028.85
  6. Step 6: Final answer
    x = 297,726.69

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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.