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Finding the Fourth Proportional to 408,593.04, 612,987.72 and 128,110.32

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Solution

The fourth proportional to 408,593.04, 612,987.72 and 128,110.32 is: 192,196.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,593.04 : 612,987.72 = 128,110.32 : x
  2. Step 2: Convert to fraction form
    408,593.04/612,987.72 = 128,110.32/x
  3. Step 3: Cross multiply
    408,593.04x = 612,987.72 × 128,110.32
  4. Step 4: Simplify right side
    408,593.04x = 78,530,052,965.27
  5. Step 5: Solve for x
    x = 78,530,052,965.27/408,593.04
  6. Step 6: Final answer
    x = 192,196.26

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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.