Home / 1,380.90-2,078.30-1,036.08

Finding the Fourth Proportional to 1,380.90, 2,078.30 and 1,036.08

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Solution

The fourth proportional to 1,380.90, 2,078.30 and 1,036.08 is: 1,559.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.90 : 2,078.30 = 1,036.08 : x
  2. Step 2: Convert to fraction form
    1,380.90/2,078.30 = 1,036.08/x
  3. Step 3: Cross multiply
    1,380.90x = 2,078.30 × 1,036.08
  4. Step 4: Simplify right side
    1,380.90x = 2,153,285.06
  5. Step 5: Solve for x
    x = 2,153,285.06/1,380.90
  6. Step 6: Final answer
    x = 1,559.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.