Home / 1,409.16-1,940.58-1,380.45

Finding the Fourth Proportional to 1,409.16, 1,940.58 and 1,380.45

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Solution

The fourth proportional to 1,409.16, 1,940.58 and 1,380.45 is: 1,901.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.16 : 1,940.58 = 1,380.45 : x
  2. Step 2: Convert to fraction form
    1,409.16/1,940.58 = 1,380.45/x
  3. Step 3: Cross multiply
    1,409.16x = 1,940.58 × 1,380.45
  4. Step 4: Simplify right side
    1,409.16x = 2,678,873.66
  5. Step 5: Solve for x
    x = 2,678,873.66/1,409.16
  6. Step 6: Final answer
    x = 1,901.04

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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.