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Finding the Fourth Proportional to 5,648.80, 8,474.80 and 2,185.12

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Solution

The fourth proportional to 5,648.80, 8,474.80 and 2,185.12 is: 3,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,648.80 : 8,474.80 = 2,185.12 : x
  2. Step 2: Convert to fraction form
    5,648.80/8,474.80 = 2,185.12/x
  3. Step 3: Cross multiply
    5,648.80x = 8,474.80 × 2,185.12
  4. Step 4: Simplify right side
    5,648.80x = 18,518,454.98
  5. Step 5: Solve for x
    x = 18,518,454.98/5,648.80
  6. Step 6: Final answer
    x = 3,278.30

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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.