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Finding the Fourth Proportional to 618,991, 854,220.54 and 350,719

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Solution

The fourth proportional to 618,991, 854,220.54 and 350,719 is: 483,999.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,991 : 854,220.54 = 350,719 : x
  2. Step 2: Convert to fraction form
    618,991/854,220.54 = 350,719/x
  3. Step 3: Cross multiply
    618,991x = 854,220.54 × 350,719
  4. Step 4: Simplify right side
    618,991x = 299,591,373,568.26
  5. Step 5: Solve for x
    x = 299,591,373,568.26/618,991
  6. Step 6: Final answer
    x = 483,999.56

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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.