Home / 1,921.55-2,650.31-1,324.23

Finding the Fourth Proportional to 1,921.55, 2,650.31 and 1,324.23

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Solution

The fourth proportional to 1,921.55, 2,650.31 and 1,324.23 is: 1,826.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.55 : 2,650.31 = 1,324.23 : x
  2. Step 2: Convert to fraction form
    1,921.55/2,650.31 = 1,324.23/x
  3. Step 3: Cross multiply
    1,921.55x = 2,650.31 × 1,324.23
  4. Step 4: Simplify right side
    1,921.55x = 3,509,613.39
  5. Step 5: Solve for x
    x = 3,509,613.39/1,921.55
  6. Step 6: Final answer
    x = 1,826.45

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Half scale
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Double scale
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Similar ratio
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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.