Home / 2,986.20-4,479.12-1,038.96

Finding the Fourth Proportional to 2,986.20, 4,479.12 and 1,038.96

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Solution

The fourth proportional to 2,986.20, 4,479.12 and 1,038.96 is: 1,558.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.20 : 4,479.12 = 1,038.96 : x
  2. Step 2: Convert to fraction form
    2,986.20/4,479.12 = 1,038.96/x
  3. Step 3: Cross multiply
    2,986.20x = 4,479.12 × 1,038.96
  4. Step 4: Simplify right side
    2,986.20x = 4,653,626.52
  5. Step 5: Solve for x
    x = 4,653,626.52/2,986.20
  6. Step 6: Final answer
    x = 1,558.38

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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.