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Finding the Fourth Proportional to 442,415.25, 663,625.35 and 109,991.25

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Solution

The fourth proportional to 442,415.25, 663,625.35 and 109,991.25 is: 164,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,415.25 : 663,625.35 = 109,991.25 : x
  2. Step 2: Convert to fraction form
    442,415.25/663,625.35 = 109,991.25/x
  3. Step 3: Cross multiply
    442,415.25x = 663,625.35 × 109,991.25
  4. Step 4: Simplify right side
    442,415.25x = 72,992,981,778.19
  5. Step 5: Solve for x
    x = 72,992,981,778.19/442,415.25
  6. Step 6: Final answer
    x = 164,987.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.