Home / 3,219.48-4,835.16-1,989.90

Finding the Fourth Proportional to 3,219.48, 4,835.16 and 1,989.90

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Solution

The fourth proportional to 3,219.48, 4,835.16 and 1,989.90 is: 2,988.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.48 : 4,835.16 = 1,989.90 : x
  2. Step 2: Convert to fraction form
    3,219.48/4,835.16 = 1,989.90/x
  3. Step 3: Cross multiply
    3,219.48x = 4,835.16 × 1,989.90
  4. Step 4: Simplify right side
    3,219.48x = 9,621,484.88
  5. Step 5: Solve for x
    x = 9,621,484.88/3,219.48
  6. Step 6: Final answer
    x = 2,988.52

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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.