Home / 3,551.36-4,900.78-1,979.42

Finding the Fourth Proportional to 3,551.36, 4,900.78 and 1,979.42

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Solution

The fourth proportional to 3,551.36, 4,900.78 and 1,979.42 is: 2,731.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,551.36 : 4,900.78 = 1,979.42 : x
  2. Step 2: Convert to fraction form
    3,551.36/4,900.78 = 1,979.42/x
  3. Step 3: Cross multiply
    3,551.36x = 4,900.78 × 1,979.42
  4. Step 4: Simplify right side
    3,551.36x = 9,700,701.95
  5. Step 5: Solve for x
    x = 9,700,701.95/3,551.36
  6. Step 6: Final answer
    x = 2,731.55

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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.