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Finding the Fourth Proportional to 638,138, 880,636.22 and 351,668.36

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Solution

The fourth proportional to 638,138, 880,636.22 and 351,668.36 is: 485,305.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,138 : 880,636.22 = 351,668.36 : x
  2. Step 2: Convert to fraction form
    638,138/880,636.22 = 351,668.36/x
  3. Step 3: Cross multiply
    638,138x = 880,636.22 × 351,668.36
  4. Step 4: Simplify right side
    638,138x = 309,691,895,244.00
  5. Step 5: Solve for x
    x = 309,691,895,244.00/638,138
  6. Step 6: Final answer
    x = 485,305.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.