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Finding the Fourth Proportional to 443,801.16, 665,813.52 and 128,255.94

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Solution

The fourth proportional to 443,801.16, 665,813.52 and 128,255.94 is: 192,416.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,801.16 : 665,813.52 = 128,255.94 : x
  2. Step 2: Convert to fraction form
    443,801.16/665,813.52 = 128,255.94/x
  3. Step 3: Cross multiply
    443,801.16x = 665,813.52 × 128,255.94
  4. Step 4: Simplify right side
    443,801.16x = 85,394,538,872.31
  5. Step 5: Solve for x
    x = 85,394,538,872.31/443,801.16
  6. Step 6: Final answer
    x = 192,416.21

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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.