Home / 4,187.20-6,280.80-2,238.40

Finding the Fourth Proportional to 4,187.20, 6,280.80 and 2,238.40

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Solution

The fourth proportional to 4,187.20, 6,280.80 and 2,238.40 is: 3,357.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,187.20 : 6,280.80 = 2,238.40 : x
  2. Step 2: Convert to fraction form
    4,187.20/6,280.80 = 2,238.40/x
  3. Step 3: Cross multiply
    4,187.20x = 6,280.80 × 2,238.40
  4. Step 4: Simplify right side
    4,187.20x = 14,058,942.72
  5. Step 5: Solve for x
    x = 14,058,942.72/4,187.20
  6. Step 6: Final answer
    x = 3,357.60

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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.