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Finding the Fourth Proportional to 885,751.20, 1,328,626.80 and 324,712.80

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Solution

The fourth proportional to 885,751.20, 1,328,626.80 and 324,712.80 is: 487,069.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,751.20 : 1,328,626.80 = 324,712.80 : x
  2. Step 2: Convert to fraction form
    885,751.20/1,328,626.80 = 324,712.80/x
  3. Step 3: Cross multiply
    885,751.20x = 1,328,626.80 × 324,712.80
  4. Step 4: Simplify right side
    885,751.20x = 431,422,128,383.04
  5. Step 5: Solve for x
    x = 431,422,128,383.04/885,751.20
  6. Step 6: Final answer
    x = 487,069.20

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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.