Home / 2,880.43-4,320.60-1,990.09

Finding the Fourth Proportional to 2,880.43, 4,320.60 and 1,990.09

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Solution

The fourth proportional to 2,880.43, 4,320.60 and 1,990.09 is: 2,985.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.43 : 4,320.60 = 1,990.09 : x
  2. Step 2: Convert to fraction form
    2,880.43/4,320.60 = 1,990.09/x
  3. Step 3: Cross multiply
    2,880.43x = 4,320.60 × 1,990.09
  4. Step 4: Simplify right side
    2,880.43x = 8,598,372.05
  5. Step 5: Solve for x
    x = 8,598,372.05/2,880.43
  6. Step 6: Final answer
    x = 2,985.10

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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.