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Finding the Fourth Proportional to 612,413.87, 845,159.27 and 340,509.69

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Solution

The fourth proportional to 612,413.87, 845,159.27 and 340,509.69 is: 469,919.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,413.87 : 845,159.27 = 340,509.69 : x
  2. Step 2: Convert to fraction form
    612,413.87/845,159.27 = 340,509.69/x
  3. Step 3: Cross multiply
    612,413.87x = 845,159.27 × 340,509.69
  4. Step 4: Simplify right side
    612,413.87x = 287,784,919,325.78
  5. Step 5: Solve for x
    x = 287,784,919,325.78/612,413.87
  6. Step 6: Final answer
    x = 469,919.01

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1.5x scale

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.