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Finding the Fourth Proportional to 638,269.86, 880,863.05 and 351,840.90

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Solution

The fourth proportional to 638,269.86, 880,863.05 and 351,840.90 is: 485,568.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,269.86 : 880,863.05 = 351,840.90 : x
  2. Step 2: Convert to fraction form
    638,269.86/880,863.05 = 351,840.90/x
  3. Step 3: Cross multiply
    638,269.86x = 880,863.05 × 351,840.90
  4. Step 4: Simplify right side
    638,269.86x = 309,923,648,288.75
  5. Step 5: Solve for x
    x = 309,923,648,288.75/638,269.86
  6. Step 6: Final answer
    x = 485,568.36

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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.