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Finding the Fourth Proportional to 3,215.76, 4,826.08 and 2,119.76

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Solution

The fourth proportional to 3,215.76, 4,826.08 and 2,119.76 is: 3,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.76 : 4,826.08 = 2,119.76 : x
  2. Step 2: Convert to fraction form
    3,215.76/4,826.08 = 2,119.76/x
  3. Step 3: Cross multiply
    3,215.76x = 4,826.08 × 2,119.76
  4. Step 4: Simplify right side
    3,215.76x = 10,230,131.34
  5. Step 5: Solve for x
    x = 10,230,131.34/3,215.76
  6. Step 6: Final answer
    x = 3,181.25

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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.