Home / 2,486.75-3,431.72-1,439.42

Finding the Fourth Proportional to 2,486.75, 3,431.72 and 1,439.42

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Solution

The fourth proportional to 2,486.75, 3,431.72 and 1,439.42 is: 1,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.75 : 3,431.72 = 1,439.42 : x
  2. Step 2: Convert to fraction form
    2,486.75/3,431.72 = 1,439.42/x
  3. Step 3: Cross multiply
    2,486.75x = 3,431.72 × 1,439.42
  4. Step 4: Simplify right side
    2,486.75x = 4,939,686.40
  5. Step 5: Solve for x
    x = 4,939,686.40/2,486.75
  6. Step 6: Final answer
    x = 1,986.40

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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.