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Finding the Fourth Proportional to 443,878.36, 665,619.90 and 128,260.24

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Solution

The fourth proportional to 443,878.36, 665,619.90 and 128,260.24 is: 192,333.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,878.36 : 665,619.90 = 128,260.24 : x
  2. Step 2: Convert to fraction form
    443,878.36/665,619.90 = 128,260.24/x
  3. Step 3: Cross multiply
    443,878.36x = 665,619.90 × 128,260.24
  4. Step 4: Simplify right side
    443,878.36x = 85,372,568,122.78
  5. Step 5: Solve for x
    x = 85,372,568,122.78/443,878.36
  6. Step 6: Final answer
    x = 192,333.25

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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.