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Finding the Fourth Proportional to 618,631.78, 854,130.28 and 386,413.70

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Solution

The fourth proportional to 618,631.78, 854,130.28 and 386,413.70 is: 533,512.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,631.78 : 854,130.28 = 386,413.70 : x
  2. Step 2: Convert to fraction form
    618,631.78/854,130.28 = 386,413.70/x
  3. Step 3: Cross multiply
    618,631.78x = 854,130.28 × 386,413.70
  4. Step 4: Simplify right side
    618,631.78x = 330,047,641,776.84
  5. Step 5: Solve for x
    x = 330,047,641,776.84/618,631.78
  6. Step 6: Final answer
    x = 533,512.26

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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.