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Finding the Fourth Proportional to 636,633.61, 878,917.64 and 422,064.27

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Solution

The fourth proportional to 636,633.61, 878,917.64 and 422,064.27 is: 582,689.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,633.61 : 878,917.64 = 422,064.27 : x
  2. Step 2: Convert to fraction form
    636,633.61/878,917.64 = 422,064.27/x
  3. Step 3: Cross multiply
    636,633.61x = 878,917.64 × 422,064.27
  4. Step 4: Simplify right side
    636,633.61x = 370,959,730,006.40
  5. Step 5: Solve for x
    x = 370,959,730,006.40/636,633.61
  6. Step 6: Final answer
    x = 582,689.52

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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.