Home / 2,878.72-4,309.86-2,188.20

Finding the Fourth Proportional to 2,878.72, 4,309.86 and 2,188.20

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Solution

The fourth proportional to 2,878.72, 4,309.86 and 2,188.20 is: 3,276.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.72 : 4,309.86 = 2,188.20 : x
  2. Step 2: Convert to fraction form
    2,878.72/4,309.86 = 2,188.20/x
  3. Step 3: Cross multiply
    2,878.72x = 4,309.86 × 2,188.20
  4. Step 4: Simplify right side
    2,878.72x = 9,430,835.65
  5. Step 5: Solve for x
    x = 9,430,835.65/2,878.72
  6. Step 6: Final answer
    x = 3,276.05

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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.