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Finding the Fourth Proportional to 443,958.48, 666,037.44 and 128,439.90

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Solution

The fourth proportional to 443,958.48, 666,037.44 and 128,439.90 is: 192,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,958.48 : 666,037.44 = 128,439.90 : x
  2. Step 2: Convert to fraction form
    443,958.48/666,037.44 = 128,439.90/x
  3. Step 3: Cross multiply
    443,958.48x = 666,037.44 × 128,439.90
  4. Step 4: Simplify right side
    443,958.48x = 85,545,782,189.86
  5. Step 5: Solve for x
    x = 85,545,782,189.86/443,958.48
  6. Step 6: Final answer
    x = 192,688.70

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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.