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Finding the Fourth Proportional to 379,044.66, 523,081.50 and 217,931.22

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Solution

The fourth proportional to 379,044.66, 523,081.50 and 217,931.22 is: 300,745.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,044.66 : 523,081.50 = 217,931.22 : x
  2. Step 2: Convert to fraction form
    379,044.66/523,081.50 = 217,931.22/x
  3. Step 3: Cross multiply
    379,044.66x = 523,081.50 × 217,931.22
  4. Step 4: Simplify right side
    379,044.66x = 113,995,789,454.43
  5. Step 5: Solve for x
    x = 113,995,789,454.43/379,044.66
  6. Step 6: Final answer
    x = 300,745.01

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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.