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Finding the Fourth Proportional to 4,480.99, 6,722.84 and 1,811.20

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Solution

The fourth proportional to 4,480.99, 6,722.84 and 1,811.20 is: 2,717.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,480.99 : 6,722.84 = 1,811.20 : x
  2. Step 2: Convert to fraction form
    4,480.99/6,722.84 = 1,811.20/x
  3. Step 3: Cross multiply
    4,480.99x = 6,722.84 × 1,811.20
  4. Step 4: Simplify right side
    4,480.99x = 12,176,407.81
  5. Step 5: Solve for x
    x = 12,176,407.81/4,480.99
  6. Step 6: Final answer
    x = 2,717.35

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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.