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Finding the Fourth Proportional to 425,828.16, 638,633.22 and 126,238.68

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Solution

The fourth proportional to 425,828.16, 638,633.22 and 126,238.68 is: 189,325.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,828.16 : 638,633.22 = 126,238.68 : x
  2. Step 2: Convert to fraction form
    425,828.16/638,633.22 = 126,238.68/x
  3. Step 3: Cross multiply
    425,828.16x = 638,633.22 × 126,238.68
  4. Step 4: Simplify right side
    425,828.16x = 80,620,214,696.95
  5. Step 5: Solve for x
    x = 80,620,214,696.95/425,828.16
  6. Step 6: Final answer
    x = 189,325.70

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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.