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Finding the Fourth Proportional to 636,994.70, 879,415.26 and 422,424.44

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Solution

The fourth proportional to 636,994.70, 879,415.26 and 422,424.44 is: 583,186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,994.70 : 879,415.26 = 422,424.44 : x
  2. Step 2: Convert to fraction form
    636,994.70/879,415.26 = 422,424.44/x
  3. Step 3: Cross multiply
    636,994.70x = 879,415.26 × 422,424.44
  4. Step 4: Simplify right side
    636,994.70x = 371,486,498,732.95
  5. Step 5: Solve for x
    x = 371,486,498,732.95/636,994.70
  6. Step 6: Final answer
    x = 583,186.17

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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.