Home / 2,107.20-2,904.48-1,640.64

Finding the Fourth Proportional to 2,107.20, 2,904.48 and 1,640.64

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Solution

The fourth proportional to 2,107.20, 2,904.48 and 1,640.64 is: 2,261.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.20 : 2,904.48 = 1,640.64 : x
  2. Step 2: Convert to fraction form
    2,107.20/2,904.48 = 1,640.64/x
  3. Step 3: Cross multiply
    2,107.20x = 2,904.48 × 1,640.64
  4. Step 4: Simplify right side
    2,107.20x = 4,765,206.07
  5. Step 5: Solve for x
    x = 4,765,206.07/2,107.20
  6. Step 6: Final answer
    x = 2,261.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.