Home / 1,921.24-2,647.69-1,683.64

Finding the Fourth Proportional to 1,921.24, 2,647.69 and 1,683.64

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Solution

The fourth proportional to 1,921.24, 2,647.69 and 1,683.64 is: 2,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.24 : 2,647.69 = 1,683.64 : x
  2. Step 2: Convert to fraction form
    1,921.24/2,647.69 = 1,683.64/x
  3. Step 3: Cross multiply
    1,921.24x = 2,647.69 × 1,683.64
  4. Step 4: Simplify right side
    1,921.24x = 4,457,756.79
  5. Step 5: Solve for x
    x = 4,457,756.79/1,921.24
  6. Step 6: Final answer
    x = 2,320.25

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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.