Home / 2,665.22-3,678.35-1,921.64

Finding the Fourth Proportional to 2,665.22, 3,678.35 and 1,921.64

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Solution

The fourth proportional to 2,665.22, 3,678.35 and 1,921.64 is: 2,652.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.22 : 3,678.35 = 1,921.64 : x
  2. Step 2: Convert to fraction form
    2,665.22/3,678.35 = 1,921.64/x
  3. Step 3: Cross multiply
    2,665.22x = 3,678.35 × 1,921.64
  4. Step 4: Simplify right side
    2,665.22x = 7,068,464.49
  5. Step 5: Solve for x
    x = 7,068,464.49/2,665.22
  6. Step 6: Final answer
    x = 2,652.11

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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.