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Finding the Fourth Proportional to 425,628.84, 638,537.22 and 126,133.32

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Solution

The fourth proportional to 425,628.84, 638,537.22 and 126,133.32 is: 189,227.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,628.84 : 638,537.22 = 126,133.32 : x
  2. Step 2: Convert to fraction form
    425,628.84/638,537.22 = 126,133.32/x
  3. Step 3: Cross multiply
    425,628.84x = 638,537.22 × 126,133.32
  4. Step 4: Simplify right side
    425,628.84x = 80,540,819,502.17
  5. Step 5: Solve for x
    x = 80,540,819,502.17/425,628.84
  6. Step 6: Final answer
    x = 189,227.82

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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.