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Finding the Fourth Proportional to 1,351,448.02, 1,865,413.43 and 778,869.55

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Solution

The fourth proportional to 1,351,448.02, 1,865,413.43 and 778,869.55 is: 1,075,079.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,448.02 : 1,865,413.43 = 778,869.55 : x
  2. Step 2: Convert to fraction form
    1,351,448.02/1,865,413.43 = 778,869.55/x
  3. Step 3: Cross multiply
    1,351,448.02x = 1,865,413.43 × 778,869.55
  4. Step 4: Simplify right side
    1,351,448.02x = 1,452,913,718,788.06
  5. Step 5: Solve for x
    x = 1,452,913,718,788.06/1,351,448.02
  6. Step 6: Final answer
    x = 1,075,079.25

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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.