Home / 2,107.65-2,904.68-1,689.39

Finding the Fourth Proportional to 2,107.65, 2,904.68 and 1,689.39

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Solution

The fourth proportional to 2,107.65, 2,904.68 and 1,689.39 is: 2,328.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.65 : 2,904.68 = 1,689.39 : x
  2. Step 2: Convert to fraction form
    2,107.65/2,904.68 = 1,689.39/x
  3. Step 3: Cross multiply
    2,107.65x = 2,904.68 × 1,689.39
  4. Step 4: Simplify right side
    2,107.65x = 4,907,118.60
  5. Step 5: Solve for x
    x = 4,907,118.60/2,107.65
  6. Step 6: Final answer
    x = 2,328.24

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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.