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Finding the Fourth Proportional to 425,215.20, 639,205.20 and 301,413.60

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Solution

The fourth proportional to 425,215.20, 639,205.20 and 301,413.60 is: 453,100.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,215.20 : 639,205.20 = 301,413.60 : x
  2. Step 2: Convert to fraction form
    425,215.20/639,205.20 = 301,413.60/x
  3. Step 3: Cross multiply
    425,215.20x = 639,205.20 × 301,413.60
  4. Step 4: Simplify right side
    425,215.20x = 192,665,140,470.72
  5. Step 5: Solve for x
    x = 192,665,140,470.72/425,215.20
  6. Step 6: Final answer
    x = 453,100.31

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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.