Home / 1,391.39-2,087.07-1,322.18

Finding the Fourth Proportional to 1,391.39, 2,087.07 and 1,322.18

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Solution

The fourth proportional to 1,391.39, 2,087.07 and 1,322.18 is: 1,983.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.39 : 2,087.07 = 1,322.18 : x
  2. Step 2: Convert to fraction form
    1,391.39/2,087.07 = 1,322.18/x
  3. Step 3: Cross multiply
    1,391.39x = 2,087.07 × 1,322.18
  4. Step 4: Simplify right side
    1,391.39x = 2,759,482.21
  5. Step 5: Solve for x
    x = 2,759,482.21/1,391.39
  6. Step 6: Final answer
    x = 1,983.26

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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.