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Finding the Fourth Proportional to 351,999.78, 485,756.71 and 199,068

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Solution

The fourth proportional to 351,999.78, 485,756.71 and 199,068 is: 274,712.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,999.78 : 485,756.71 = 199,068 : x
  2. Step 2: Convert to fraction form
    351,999.78/485,756.71 = 199,068/x
  3. Step 3: Cross multiply
    351,999.78x = 485,756.71 × 199,068
  4. Step 4: Simplify right side
    351,999.78x = 96,698,616,746.28
  5. Step 5: Solve for x
    x = 96,698,616,746.28/351,999.78
  6. Step 6: Final answer
    x = 274,712.15

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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.