Home / 1,380.16-2,060.09-1,216.12

Finding the Fourth Proportional to 1,380.16, 2,060.09 and 1,216.12

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Solution

The fourth proportional to 1,380.16, 2,060.09 and 1,216.12 is: 1,815.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.16 : 2,060.09 = 1,216.12 : x
  2. Step 2: Convert to fraction form
    1,380.16/2,060.09 = 1,216.12/x
  3. Step 3: Cross multiply
    1,380.16x = 2,060.09 × 1,216.12
  4. Step 4: Simplify right side
    1,380.16x = 2,505,316.65
  5. Step 5: Solve for x
    x = 2,505,316.65/1,380.16
  6. Step 6: Final answer
    x = 1,815.24

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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.