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Finding the Fourth Proportional to 399,772.97, 599,571.15 and 115,401.74

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Solution

The fourth proportional to 399,772.97, 599,571.15 and 115,401.74 is: 173,077.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,772.97 : 599,571.15 = 115,401.74 : x
  2. Step 2: Convert to fraction form
    399,772.97/599,571.15 = 115,401.74/x
  3. Step 3: Cross multiply
    399,772.97x = 599,571.15 × 115,401.74
  4. Step 4: Simplify right side
    399,772.97x = 69,191,553,963.80
  5. Step 5: Solve for x
    x = 69,191,553,963.80/399,772.97
  6. Step 6: Final answer
    x = 173,077.12

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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.