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Finding the Fourth Proportional to 3,890.98, 5,366.57 and 2,474.90

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Solution

The fourth proportional to 3,890.98, 5,366.57 and 2,474.90 is: 3,413.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.98 : 5,366.57 = 2,474.90 : x
  2. Step 2: Convert to fraction form
    3,890.98/5,366.57 = 2,474.90/x
  3. Step 3: Cross multiply
    3,890.98x = 5,366.57 × 2,474.90
  4. Step 4: Simplify right side
    3,890.98x = 13,281,703.45
  5. Step 5: Solve for x
    x = 13,281,703.45/3,890.98
  6. Step 6: Final answer
    x = 3,413.46

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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.