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Finding the Fourth Proportional to 639,042.85, 957,835.38 and 399,267

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Solution

The fourth proportional to 639,042.85, 957,835.38 and 399,267 is: 598,445.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,042.85 : 957,835.38 = 399,267 : x
  2. Step 2: Convert to fraction form
    639,042.85/957,835.38 = 399,267/x
  3. Step 3: Cross multiply
    639,042.85x = 957,835.38 × 399,267
  4. Step 4: Simplify right side
    639,042.85x = 382,432,058,666.46
  5. Step 5: Solve for x
    x = 382,432,058,666.46/639,042.85
  6. Step 6: Final answer
    x = 598,445.10

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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.