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Finding the Fourth Proportional to 636,603.20, 878,875.72 and 422,033.90

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Solution

The fourth proportional to 636,603.20, 878,875.72 and 422,033.90 is: 582,647.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,603.20 : 878,875.72 = 422,033.90 : x
  2. Step 2: Convert to fraction form
    636,603.20/878,875.72 = 422,033.90/x
  3. Step 3: Cross multiply
    636,603.20x = 878,875.72 × 422,033.90
  4. Step 4: Simplify right side
    636,603.20x = 370,915,342,277.45
  5. Step 5: Solve for x
    x = 370,915,342,277.45/636,603.20
  6. Step 6: Final answer
    x = 582,647.63

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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.