Home / 679,121.79-936,983.68-407,090.43

Finding the Fourth Proportional to 679,121.79, 936,983.68 and 407,090.43

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Solution

The fourth proportional to 679,121.79, 936,983.68 and 407,090.43 is: 561,662.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,121.79 : 936,983.68 = 407,090.43 : x
  2. Step 2: Convert to fraction form
    679,121.79/936,983.68 = 407,090.43/x
  3. Step 3: Cross multiply
    679,121.79x = 936,983.68 × 407,090.43
  4. Step 4: Simplify right side
    679,121.79x = 381,437,089,194.18
  5. Step 5: Solve for x
    x = 381,437,089,194.18/679,121.79
  6. Step 6: Final answer
    x = 561,662.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.