Home / 1,242,566.16-1,861,413.39-643,920

Finding the Fourth Proportional to 1,242,566.16, 1,861,413.39 and 643,920

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Solution

The fourth proportional to 1,242,566.16, 1,861,413.39 and 643,920 is: 964,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,566.16 : 1,861,413.39 = 643,920 : x
  2. Step 2: Convert to fraction form
    1,242,566.16/1,861,413.39 = 643,920/x
  3. Step 3: Cross multiply
    1,242,566.16x = 1,861,413.39 × 643,920
  4. Step 4: Simplify right side
    1,242,566.16x = 1,198,601,310,088.80
  5. Step 5: Solve for x
    x = 1,198,601,310,088.80/1,242,566.16
  6. Step 6: Final answer
    x = 964,617.70

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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.