Home / 1,555.58-2,137.10-1,391.96

Finding the Fourth Proportional to 1,555.58, 2,137.10 and 1,391.96

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Solution

The fourth proportional to 1,555.58, 2,137.10 and 1,391.96 is: 1,912.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.58 : 2,137.10 = 1,391.96 : x
  2. Step 2: Convert to fraction form
    1,555.58/2,137.10 = 1,391.96/x
  3. Step 3: Cross multiply
    1,555.58x = 2,137.10 × 1,391.96
  4. Step 4: Simplify right side
    1,555.58x = 2,974,757.72
  5. Step 5: Solve for x
    x = 2,974,757.72/1,555.58
  6. Step 6: Final answer
    x = 1,912.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.