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Finding the Fourth Proportional to 618,898.01, 854,359.02 and 389,792.00

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Solution

The fourth proportional to 618,898.01, 854,359.02 and 389,792.00 is: 538,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,898.01 : 854,359.02 = 389,792.00 : x
  2. Step 2: Convert to fraction form
    618,898.01/854,359.02 = 389,792.00/x
  3. Step 3: Cross multiply
    618,898.01x = 854,359.02 × 389,792.00
  4. Step 4: Simplify right side
    618,898.01x = 333,022,306,852.05
  5. Step 5: Solve for x
    x = 333,022,306,852.05/618,898.01
  6. Step 6: Final answer
    x = 538,089.16

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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.