Home / 2,880.72-4,312.86-2,190.20

Finding the Fourth Proportional to 2,880.72, 4,312.86 and 2,190.20

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Solution

The fourth proportional to 2,880.72, 4,312.86 and 2,190.20 is: 3,279.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.72 : 4,312.86 = 2,190.20 : x
  2. Step 2: Convert to fraction form
    2,880.72/4,312.86 = 2,190.20/x
  3. Step 3: Cross multiply
    2,880.72x = 4,312.86 × 2,190.20
  4. Step 4: Simplify right side
    2,880.72x = 9,446,025.97
  5. Step 5: Solve for x
    x = 9,446,025.97/2,880.72
  6. Step 6: Final answer
    x = 3,279.05

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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.