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Finding the Fourth Proportional to 638,081.70, 880,571.27 and 351,620.26

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Solution

The fourth proportional to 638,081.70, 880,571.27 and 351,620.26 is: 485,246.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,081.70 : 880,571.27 = 351,620.26 : x
  2. Step 2: Convert to fraction form
    638,081.70/880,571.27 = 351,620.26/x
  3. Step 3: Cross multiply
    638,081.70x = 880,571.27 × 351,620.26
  4. Step 4: Simplify right side
    638,081.70x = 309,626,698,905.93
  5. Step 5: Solve for x
    x = 309,626,698,905.93/638,081.70
  6. Step 6: Final answer
    x = 485,246.17

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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.