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Finding the Fourth Proportional to 287,220, 396,372.72 and 179,755.68

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Solution

The fourth proportional to 287,220, 396,372.72 and 179,755.68 is: 248,068.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,220 : 396,372.72 = 179,755.68 : x
  2. Step 2: Convert to fraction form
    287,220/396,372.72 = 179,755.68/x
  3. Step 3: Cross multiply
    287,220x = 396,372.72 × 179,755.68
  4. Step 4: Simplify right side
    287,220x = 71,250,247,817.05
  5. Step 5: Solve for x
    x = 71,250,247,817.05/287,220
  6. Step 6: Final answer
    x = 248,068.55

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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.