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Finding the Fourth Proportional to 2,579,608.80, 3,869,413.20 and 686,541.60

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Solution

The fourth proportional to 2,579,608.80, 3,869,413.20 and 686,541.60 is: 1,029,812.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579,608.80 : 3,869,413.20 = 686,541.60 : x
  2. Step 2: Convert to fraction form
    2,579,608.80/3,869,413.20 = 686,541.60/x
  3. Step 3: Cross multiply
    2,579,608.80x = 3,869,413.20 × 686,541.60
  4. Step 4: Simplify right side
    2,579,608.80x = 2,656,513,129,389.12
  5. Step 5: Solve for x
    x = 2,656,513,129,389.12/2,579,608.80
  6. Step 6: Final answer
    x = 1,029,812.40

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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.