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Finding the Fourth Proportional to 485,578.94, 670,105.04 and 281,638.49

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Solution

The fourth proportional to 485,578.94, 670,105.04 and 281,638.49 is: 388,664.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,578.94 : 670,105.04 = 281,638.49 : x
  2. Step 2: Convert to fraction form
    485,578.94/670,105.04 = 281,638.49/x
  3. Step 3: Cross multiply
    485,578.94x = 670,105.04 × 281,638.49
  4. Step 4: Simplify right side
    485,578.94x = 188,727,366,848.27
  5. Step 5: Solve for x
    x = 188,727,366,848.27/485,578.94
  6. Step 6: Final answer
    x = 388,664.65

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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.