Home / 1,555.14-2,147.94-1,261.92

Finding the Fourth Proportional to 1,555.14, 2,147.94 and 1,261.92

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Solution

The fourth proportional to 1,555.14, 2,147.94 and 1,261.92 is: 1,742.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.14 : 2,147.94 = 1,261.92 : x
  2. Step 2: Convert to fraction form
    1,555.14/2,147.94 = 1,261.92/x
  3. Step 3: Cross multiply
    1,555.14x = 2,147.94 × 1,261.92
  4. Step 4: Simplify right side
    1,555.14x = 2,710,528.44
  5. Step 5: Solve for x
    x = 2,710,528.44/1,555.14
  6. Step 6: Final answer
    x = 1,742.95

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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.