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Finding the Fourth Proportional to 323,879.49, 485,702.60 and 136,905.57

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Solution

The fourth proportional to 323,879.49, 485,702.60 and 136,905.57 is: 205,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,879.49 : 485,702.60 = 136,905.57 : x
  2. Step 2: Convert to fraction form
    323,879.49/485,702.60 = 136,905.57/x
  3. Step 3: Cross multiply
    323,879.49x = 485,702.60 × 136,905.57
  4. Step 4: Simplify right side
    323,879.49x = 66,495,390,618.95
  5. Step 5: Solve for x
    x = 66,495,390,618.95/323,879.49
  6. Step 6: Final answer
    x = 205,309.05

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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.