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Finding the Fourth Proportional to 618,898.75, 854,360.06 and 389,792.75

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Solution

The fourth proportional to 618,898.75, 854,360.06 and 389,792.75 is: 538,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,898.75 : 854,360.06 = 389,792.75 : x
  2. Step 2: Convert to fraction form
    618,898.75/854,360.06 = 389,792.75/x
  3. Step 3: Cross multiply
    618,898.75x = 854,360.06 × 389,792.75
  4. Step 4: Simplify right side
    618,898.75x = 333,023,351,056.80
  5. Step 5: Solve for x
    x = 333,023,351,056.80/618,898.75
  6. Step 6: Final answer
    x = 538,090.20

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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.