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Finding the Fourth Proportional to 639,042.33, 957,834.62 and 399,266.49

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Solution

The fourth proportional to 639,042.33, 957,834.62 and 399,266.49 is: 598,444.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,042.33 : 957,834.62 = 399,266.49 : x
  2. Step 2: Convert to fraction form
    639,042.33/957,834.62 = 399,266.49/x
  3. Step 3: Cross multiply
    639,042.33x = 957,834.62 × 399,266.49
  4. Step 4: Simplify right side
    639,042.33x = 382,431,264,731.55
  5. Step 5: Solve for x
    x = 382,431,264,731.55/639,042.33
  6. Step 6: Final answer
    x = 598,444.34

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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.