Home / 1,356.10-2,025.09-1,286.90

Finding the Fourth Proportional to 1,356.10, 2,025.09 and 1,286.90

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Solution

The fourth proportional to 1,356.10, 2,025.09 and 1,286.90 is: 1,921.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.10 : 2,025.09 = 1,286.90 : x
  2. Step 2: Convert to fraction form
    1,356.10/2,025.09 = 1,286.90/x
  3. Step 3: Cross multiply
    1,356.10x = 2,025.09 × 1,286.90
  4. Step 4: Simplify right side
    1,356.10x = 2,606,088.32
  5. Step 5: Solve for x
    x = 2,606,088.32/1,356.10
  6. Step 6: Final answer
    x = 1,921.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.