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Finding the Fourth Proportional to 443,136.80, 664,705.20 and 127,625.60

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Solution

The fourth proportional to 443,136.80, 664,705.20 and 127,625.60 is: 191,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,136.80 : 664,705.20 = 127,625.60 : x
  2. Step 2: Convert to fraction form
    443,136.80/664,705.20 = 127,625.60/x
  3. Step 3: Cross multiply
    443,136.80x = 664,705.20 × 127,625.60
  4. Step 4: Simplify right side
    443,136.80x = 84,833,399,973.12
  5. Step 5: Solve for x
    x = 84,833,399,973.12/443,136.80
  6. Step 6: Final answer
    x = 191,438.40

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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.