Home / 639,724.12-959,847.19-412,138.67

Finding the Fourth Proportional to 639,724.12, 959,847.19 and 412,138.67

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Solution

The fourth proportional to 639,724.12, 959,847.19 and 412,138.67 is: 618,376.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,724.12 : 959,847.19 = 412,138.67 : x
  2. Step 2: Convert to fraction form
    639,724.12/959,847.19 = 412,138.67/x
  3. Step 3: Cross multiply
    639,724.12x = 959,847.19 × 412,138.67
  4. Step 4: Simplify right side
    639,724.12x = 395,590,143,668.75
  5. Step 5: Solve for x
    x = 395,590,143,668.75/639,724.12
  6. Step 6: Final answer
    x = 618,376.16

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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.