Home / 1,380.99-2,069.55-1,071.42

Finding the Fourth Proportional to 1,380.99, 2,069.55 and 1,071.42

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Solution

The fourth proportional to 1,380.99, 2,069.55 and 1,071.42 is: 1,605.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.99 : 2,069.55 = 1,071.42 : x
  2. Step 2: Convert to fraction form
    1,380.99/2,069.55 = 1,071.42/x
  3. Step 3: Cross multiply
    1,380.99x = 2,069.55 × 1,071.42
  4. Step 4: Simplify right side
    1,380.99x = 2,217,357.26
  5. Step 5: Solve for x
    x = 2,217,357.26/1,380.99
  6. Step 6: Final answer
    x = 1,605.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.