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Finding the Fourth Proportional to 636,677.85, 878,978.57 and 422,108.54

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Solution

The fourth proportional to 636,677.85, 878,978.57 and 422,108.54 is: 582,750.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,677.85 : 878,978.57 = 422,108.54 : x
  2. Step 2: Convert to fraction form
    636,677.85/878,978.57 = 422,108.54/x
  3. Step 3: Cross multiply
    636,677.85x = 878,978.57 × 422,108.54
  4. Step 4: Simplify right side
    636,677.85x = 371,024,360,873.99
  5. Step 5: Solve for x
    x = 371,024,360,873.99/636,677.85
  6. Step 6: Final answer
    x = 582,750.54

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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.