Home / 2,782.08-4,172.40-1,394.55

Finding the Fourth Proportional to 2,782.08, 4,172.40 and 1,394.55

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Solution

The fourth proportional to 2,782.08, 4,172.40 and 1,394.55 is: 2,091.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.08 : 4,172.40 = 1,394.55 : x
  2. Step 2: Convert to fraction form
    2,782.08/4,172.40 = 1,394.55/x
  3. Step 3: Cross multiply
    2,782.08x = 4,172.40 × 1,394.55
  4. Step 4: Simplify right side
    2,782.08x = 5,818,620.42
  5. Step 5: Solve for x
    x = 5,818,620.42/2,782.08
  6. Step 6: Final answer
    x = 2,091.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.