Home / 1,380.72-2,074.32-1,186.32

Finding the Fourth Proportional to 1,380.72, 2,074.32 and 1,186.32

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Solution

The fourth proportional to 1,380.72, 2,074.32 and 1,186.32 is: 1,782.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.72 : 2,074.32 = 1,186.32 : x
  2. Step 2: Convert to fraction form
    1,380.72/2,074.32 = 1,186.32/x
  3. Step 3: Cross multiply
    1,380.72x = 2,074.32 × 1,186.32
  4. Step 4: Simplify right side
    1,380.72x = 2,460,807.30
  5. Step 5: Solve for x
    x = 2,460,807.30/1,380.72
  6. Step 6: Final answer
    x = 1,782.26

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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.