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Finding the Fourth Proportional to 425,740.84, 638,705.22 and 126,245.32

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Solution

The fourth proportional to 425,740.84, 638,705.22 and 126,245.32 is: 189,395.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,740.84 : 638,705.22 = 126,245.32 : x
  2. Step 2: Convert to fraction form
    425,740.84/638,705.22 = 126,245.32/x
  3. Step 3: Cross multiply
    425,740.84x = 638,705.22 × 126,245.32
  4. Step 4: Simplify right side
    425,740.84x = 80,633,544,884.57
  5. Step 5: Solve for x
    x = 80,633,544,884.57/425,740.84
  6. Step 6: Final answer
    x = 189,395.84

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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.