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Finding the Fourth Proportional to 287,245.90, 396,392.15 and 158,183.37

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Solution

The fourth proportional to 287,245.90, 396,392.15 and 158,183.37 is: 218,289.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,245.90 : 396,392.15 = 158,183.37 : x
  2. Step 2: Convert to fraction form
    287,245.90/396,392.15 = 158,183.37/x
  3. Step 3: Cross multiply
    287,245.90x = 396,392.15 × 158,183.37
  4. Step 4: Simplify right side
    287,245.90x = 62,702,646,128.55
  5. Step 5: Solve for x
    x = 62,702,646,128.55/287,245.90
  6. Step 6: Final answer
    x = 218,289.09

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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.