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Finding the Fourth Proportional to 379,057.53, 522,980.85 and 217,853.49

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Solution

The fourth proportional to 379,057.53, 522,980.85 and 217,853.49 is: 300,569.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,057.53 : 522,980.85 = 217,853.49 : x
  2. Step 2: Convert to fraction form
    379,057.53/522,980.85 = 217,853.49/x
  3. Step 3: Cross multiply
    379,057.53x = 522,980.85 × 217,853.49
  4. Step 4: Simplify right side
    379,057.53x = 113,933,203,375.67
  5. Step 5: Solve for x
    x = 113,933,203,375.67/379,057.53
  6. Step 6: Final answer
    x = 300,569.69

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1.5x scale

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.