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Finding the Fourth Proportional to 399,997.60, 600,002.80 and 104,509.60

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Solution

The fourth proportional to 399,997.60, 600,002.80 and 104,509.60 is: 156,766.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,997.60 : 600,002.80 = 104,509.60 : x
  2. Step 2: Convert to fraction form
    399,997.60/600,002.80 = 104,509.60/x
  3. Step 3: Cross multiply
    399,997.60x = 600,002.80 × 104,509.60
  4. Step 4: Simplify right side
    399,997.60x = 62,706,052,626.88
  5. Step 5: Solve for x
    x = 62,706,052,626.88/399,997.60
  6. Step 6: Final answer
    x = 156,766.07

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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.