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Finding the Fourth Proportional to 443,734.08, 665,469.72 and 128,193.84

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Solution

The fourth proportional to 443,734.08, 665,469.72 and 128,193.84 is: 192,252.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,734.08 : 665,469.72 = 128,193.84 : x
  2. Step 2: Convert to fraction form
    443,734.08/665,469.72 = 128,193.84/x
  3. Step 3: Cross multiply
    443,734.08x = 665,469.72 × 128,193.84
  4. Step 4: Simplify right side
    443,734.08x = 85,309,118,810.52
  5. Step 5: Solve for x
    x = 85,309,118,810.52/443,734.08
  6. Step 6: Final answer
    x = 192,252.80

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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.