Home / 1,985.60-2,739.42-1,238.95

Finding the Fourth Proportional to 1,985.60, 2,739.42 and 1,238.95

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Solution

The fourth proportional to 1,985.60, 2,739.42 and 1,238.95 is: 1,709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.60 : 2,739.42 = 1,238.95 : x
  2. Step 2: Convert to fraction form
    1,985.60/2,739.42 = 1,238.95/x
  3. Step 3: Cross multiply
    1,985.60x = 2,739.42 × 1,238.95
  4. Step 4: Simplify right side
    1,985.60x = 3,394,007.83
  5. Step 5: Solve for x
    x = 3,394,007.83/1,985.60
  6. Step 6: Final answer
    x = 1,709.31

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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.