Home / 1,636.39-2,455.19-1,330.21

Finding the Fourth Proportional to 1,636.39, 2,455.19 and 1,330.21

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Solution

The fourth proportional to 1,636.39, 2,455.19 and 1,330.21 is: 1,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.39 : 2,455.19 = 1,330.21 : x
  2. Step 2: Convert to fraction form
    1,636.39/2,455.19 = 1,330.21/x
  3. Step 3: Cross multiply
    1,636.39x = 2,455.19 × 1,330.21
  4. Step 4: Simplify right side
    1,636.39x = 3,265,918.29
  5. Step 5: Solve for x
    x = 3,265,918.29/1,636.39
  6. Step 6: Final answer
    x = 1,995.81

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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.