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Finding the Fourth Proportional to 3,413.72, 4,710.43 and 1,921.55

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Solution

The fourth proportional to 3,413.72, 4,710.43 and 1,921.55 is: 2,651.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,413.72 : 4,710.43 = 1,921.55 : x
  2. Step 2: Convert to fraction form
    3,413.72/4,710.43 = 1,921.55/x
  3. Step 3: Cross multiply
    3,413.72x = 4,710.43 × 1,921.55
  4. Step 4: Simplify right side
    3,413.72x = 9,051,317.16
  5. Step 5: Solve for x
    x = 9,051,317.16/3,413.72
  6. Step 6: Final answer
    x = 2,651.45

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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.