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Finding the Fourth Proportional to 636,992.70, 879,412.50 and 422,422.44

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Solution

The fourth proportional to 636,992.70, 879,412.50 and 422,422.44 is: 583,183.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,992.70 : 879,412.50 = 422,422.44 : x
  2. Step 2: Convert to fraction form
    636,992.70/879,412.50 = 422,422.44/x
  3. Step 3: Cross multiply
    636,992.70x = 879,412.50 × 422,422.44
  4. Step 4: Simplify right side
    636,992.70x = 371,483,574,016.50
  5. Step 5: Solve for x
    x = 371,483,574,016.50/636,992.70
  6. Step 6: Final answer
    x = 583,183.41

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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.