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Finding the Fourth Proportional to 644,604.62, 889,569.20 and 354,234.24

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Solution

The fourth proportional to 644,604.62, 889,569.20 and 354,234.24 is: 488,851.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,604.62 : 889,569.20 = 354,234.24 : x
  2. Step 2: Convert to fraction form
    644,604.62/889,569.20 = 354,234.24/x
  3. Step 3: Cross multiply
    644,604.62x = 889,569.20 × 354,234.24
  4. Step 4: Simplify right side
    644,604.62x = 315,115,866,378.66
  5. Step 5: Solve for x
    x = 315,115,866,378.66/644,604.62
  6. Step 6: Final answer
    x = 488,851.39

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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.