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Finding the Fourth Proportional to 379,043.66, 523,080.12 and 217,930.22

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Solution

The fourth proportional to 379,043.66, 523,080.12 and 217,930.22 is: 300,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,043.66 : 523,080.12 = 217,930.22 : x
  2. Step 2: Convert to fraction form
    379,043.66/523,080.12 = 217,930.22/x
  3. Step 3: Cross multiply
    379,043.66x = 523,080.12 × 217,930.22
  4. Step 4: Simplify right side
    379,043.66x = 113,994,965,629.23
  5. Step 5: Solve for x
    x = 113,994,965,629.23/379,043.66
  6. Step 6: Final answer
    x = 300,743.63

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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.