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Finding the Fourth Proportional to 3,479.80, 5,219.66 and 847.32

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Solution

The fourth proportional to 3,479.80, 5,219.66 and 847.32 is: 1,270.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.80 : 5,219.66 = 847.32 : x
  2. Step 2: Convert to fraction form
    3,479.80/5,219.66 = 847.32/x
  3. Step 3: Cross multiply
    3,479.80x = 5,219.66 × 847.32
  4. Step 4: Simplify right side
    3,479.80x = 4,422,722.31
  5. Step 5: Solve for x
    x = 4,422,722.31/3,479.80
  6. Step 6: Final answer
    x = 1,270.97

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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.