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Finding the Fourth Proportional to 443,847.36, 665,673.60 and 128,235.60

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Solution

The fourth proportional to 443,847.36, 665,673.60 and 128,235.60 is: 192,325.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,847.36 : 665,673.60 = 128,235.60 : x
  2. Step 2: Convert to fraction form
    443,847.36/665,673.60 = 128,235.60/x
  3. Step 3: Cross multiply
    443,847.36x = 665,673.60 × 128,235.60
  4. Step 4: Simplify right side
    443,847.36x = 85,363,053,500.16
  5. Step 5: Solve for x
    x = 85,363,053,500.16/443,847.36
  6. Step 6: Final answer
    x = 192,325.25

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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.