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Finding the Fourth Proportional to 443,836.99, 665,760.34 and 128,296.63

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Solution

The fourth proportional to 443,836.99, 665,760.34 and 128,296.63 is: 192,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,836.99 : 665,760.34 = 128,296.63 : x
  2. Step 2: Convert to fraction form
    443,836.99/665,760.34 = 128,296.63/x
  3. Step 3: Cross multiply
    443,836.99x = 665,760.34 × 128,296.63
  4. Step 4: Simplify right side
    443,836.99x = 85,414,808,009.65
  5. Step 5: Solve for x
    x = 85,414,808,009.65/443,836.99
  6. Step 6: Final answer
    x = 192,446.35

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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.