Home / 2,630.78-3,631.94-1,921.92

Finding the Fourth Proportional to 2,630.78, 3,631.94 and 1,921.92

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Solution

The fourth proportional to 2,630.78, 3,631.94 and 1,921.92 is: 2,653.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.78 : 3,631.94 = 1,921.92 : x
  2. Step 2: Convert to fraction form
    2,630.78/3,631.94 = 1,921.92/x
  3. Step 3: Cross multiply
    2,630.78x = 3,631.94 × 1,921.92
  4. Step 4: Simplify right side
    2,630.78x = 6,980,298.12
  5. Step 5: Solve for x
    x = 6,980,298.12/2,630.78
  6. Step 6: Final answer
    x = 2,653.32

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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.