Home / 3,215.85-4,815.91-2,904.21

Finding the Fourth Proportional to 3,215.85, 4,815.91 and 2,904.21

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Solution

The fourth proportional to 3,215.85, 4,815.91 and 2,904.21 is: 4,349.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.85 : 4,815.91 = 2,904.21 : x
  2. Step 2: Convert to fraction form
    3,215.85/4,815.91 = 2,904.21/x
  3. Step 3: Cross multiply
    3,215.85x = 4,815.91 × 2,904.21
  4. Step 4: Simplify right side
    3,215.85x = 13,986,413.98
  5. Step 5: Solve for x
    x = 13,986,413.98/3,215.85
  6. Step 6: Final answer
    x = 4,349.21

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1.5x scale

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.