Home / 2,880.78-4,321.08-1,398.24

Finding the Fourth Proportional to 2,880.78, 4,321.08 and 1,398.24

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Solution

The fourth proportional to 2,880.78, 4,321.08 and 1,398.24 is: 2,097.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.78 : 4,321.08 = 1,398.24 : x
  2. Step 2: Convert to fraction form
    2,880.78/4,321.08 = 1,398.24/x
  3. Step 3: Cross multiply
    2,880.78x = 4,321.08 × 1,398.24
  4. Step 4: Simplify right side
    2,880.78x = 6,041,906.90
  5. Step 5: Solve for x
    x = 6,041,906.90/2,880.78
  6. Step 6: Final answer
    x = 2,097.32

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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.