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Finding the Fourth Proportional to 636,677.35, 878,977.88 and 422,108.04

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Solution

The fourth proportional to 636,677.35, 878,977.88 and 422,108.04 is: 582,749.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,677.35 : 878,977.88 = 422,108.04 : x
  2. Step 2: Convert to fraction form
    636,677.35/878,977.88 = 422,108.04/x
  3. Step 3: Cross multiply
    636,677.35x = 878,977.88 × 422,108.04
  4. Step 4: Simplify right side
    636,677.35x = 371,023,630,130.16
  5. Step 5: Solve for x
    x = 371,023,630,130.16/636,677.35
  6. Step 6: Final answer
    x = 582,749.85

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1.5x scale

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.