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Finding the Fourth Proportional to 399,072.30, 598,608.45 and 379,389.30

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Solution

The fourth proportional to 399,072.30, 598,608.45 and 379,389.30 is: 569,083.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,072.30 : 598,608.45 = 379,389.30 : x
  2. Step 2: Convert to fraction form
    399,072.30/598,608.45 = 379,389.30/x
  3. Step 3: Cross multiply
    399,072.30x = 598,608.45 × 379,389.30
  4. Step 4: Simplify right side
    399,072.30x = 227,105,640,819.59
  5. Step 5: Solve for x
    x = 227,105,640,819.59/399,072.30
  6. Step 6: Final answer
    x = 569,083.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.