Home / 3,219.12-4,828.68-1,987.02

Finding the Fourth Proportional to 3,219.12, 4,828.68 and 1,987.02

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Solution

The fourth proportional to 3,219.12, 4,828.68 and 1,987.02 is: 2,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.12 : 4,828.68 = 1,987.02 : x
  2. Step 2: Convert to fraction form
    3,219.12/4,828.68 = 1,987.02/x
  3. Step 3: Cross multiply
    3,219.12x = 4,828.68 × 1,987.02
  4. Step 4: Simplify right side
    3,219.12x = 9,594,683.73
  5. Step 5: Solve for x
    x = 9,594,683.73/3,219.12
  6. Step 6: Final answer
    x = 2,980.53

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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.