Home / 2,380.40-3,570.74-919.56

Finding the Fourth Proportional to 2,380.40, 3,570.74 and 919.56

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Solution

The fourth proportional to 2,380.40, 3,570.74 and 919.56 is: 1,379.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.40 : 3,570.74 = 919.56 : x
  2. Step 2: Convert to fraction form
    2,380.40/3,570.74 = 919.56/x
  3. Step 3: Cross multiply
    2,380.40x = 3,570.74 × 919.56
  4. Step 4: Simplify right side
    2,380.40x = 3,283,509.67
  5. Step 5: Solve for x
    x = 3,283,509.67/2,380.40
  6. Step 6: Final answer
    x = 1,379.39

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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.