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Finding the Fourth Proportional to 258,636.87, 387,800.60 and 100,680.39

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Solution

The fourth proportional to 258,636.87, 387,800.60 and 100,680.39 is: 150,960.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,636.87 : 387,800.60 = 100,680.39 : x
  2. Step 2: Convert to fraction form
    258,636.87/387,800.60 = 100,680.39/x
  3. Step 3: Cross multiply
    258,636.87x = 387,800.60 × 100,680.39
  4. Step 4: Simplify right side
    258,636.87x = 39,043,915,146.83
  5. Step 5: Solve for x
    x = 39,043,915,146.83/258,636.87
  6. Step 6: Final answer
    x = 150,960.36

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1.5x scale

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.