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Finding the Fourth Proportional to 443,686.24, 665,431.62 and 128,074.60

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Solution

The fourth proportional to 443,686.24, 665,431.62 and 128,074.60 is: 192,083.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,686.24 : 665,431.62 = 128,074.60 : x
  2. Step 2: Convert to fraction form
    443,686.24/665,431.62 = 128,074.60/x
  3. Step 3: Cross multiply
    443,686.24x = 665,431.62 × 128,074.60
  4. Step 4: Simplify right side
    443,686.24x = 85,224,888,558.85
  5. Step 5: Solve for x
    x = 85,224,888,558.85/443,686.24
  6. Step 6: Final answer
    x = 192,083.69

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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.