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Finding the Fourth Proportional to 639,576.32, 959,865.60 and 446,193.08

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Solution

The fourth proportional to 639,576.32, 959,865.60 and 446,193.08 is: 669,639.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,576.32 : 959,865.60 = 446,193.08 : x
  2. Step 2: Convert to fraction form
    639,576.32/959,865.60 = 446,193.08/x
  3. Step 3: Cross multiply
    639,576.32x = 959,865.60 × 446,193.08
  4. Step 4: Simplify right side
    639,576.32x = 428,285,388,450.05
  5. Step 5: Solve for x
    x = 428,285,388,450.05/639,576.32
  6. Step 6: Final answer
    x = 669,639.22

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1.5x scale

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.