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Finding the Fourth Proportional to 258,608.70, 387,682.20 and 100,800.45

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Solution

The fourth proportional to 258,608.70, 387,682.20 and 100,800.45 is: 151,110.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,608.70 : 387,682.20 = 100,800.45 : x
  2. Step 2: Convert to fraction form
    258,608.70/387,682.20 = 100,800.45/x
  3. Step 3: Cross multiply
    258,608.70x = 387,682.20 × 100,800.45
  4. Step 4: Simplify right side
    258,608.70x = 39,078,540,216.99
  5. Step 5: Solve for x
    x = 39,078,540,216.99/258,608.70
  6. Step 6: Final answer
    x = 151,110.69

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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.