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Finding the Fourth Proportional to 258,910.60, 388,378.70 and 134,494.60

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Solution

The fourth proportional to 258,910.60, 388,378.70 and 134,494.60 is: 201,748.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,910.60 : 388,378.70 = 134,494.60 : x
  2. Step 2: Convert to fraction form
    258,910.60/388,378.70 = 134,494.60/x
  3. Step 3: Cross multiply
    258,910.60x = 388,378.70 × 134,494.60
  4. Step 4: Simplify right side
    258,910.60x = 52,234,837,905.02
  5. Step 5: Solve for x
    x = 52,234,837,905.02/258,910.60
  6. Step 6: Final answer
    x = 201,748.55

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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.