Home / 2,218.79-3,312.19-1,928.31

Finding the Fourth Proportional to 2,218.79, 3,312.19 and 1,928.31

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Solution

The fourth proportional to 2,218.79, 3,312.19 and 1,928.31 is: 2,878.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.79 : 3,312.19 = 1,928.31 : x
  2. Step 2: Convert to fraction form
    2,218.79/3,312.19 = 1,928.31/x
  3. Step 3: Cross multiply
    2,218.79x = 3,312.19 × 1,928.31
  4. Step 4: Simplify right side
    2,218.79x = 6,386,919.09
  5. Step 5: Solve for x
    x = 6,386,919.09/2,218.79
  6. Step 6: Final answer
    x = 2,878.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.