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Finding the Fourth Proportional to 618,368.20, 927,455.10 and 218,951.80

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Solution

The fourth proportional to 618,368.20, 927,455.10 and 218,951.80 is: 328,393.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,368.20 : 927,455.10 = 218,951.80 : x
  2. Step 2: Convert to fraction form
    618,368.20/927,455.10 = 218,951.80/x
  3. Step 3: Cross multiply
    618,368.20x = 927,455.10 × 218,951.80
  4. Step 4: Simplify right side
    618,368.20x = 203,067,963,564.18
  5. Step 5: Solve for x
    x = 203,067,963,564.18/618,368.20
  6. Step 6: Final answer
    x = 328,393.28

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1.5x scale

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.