Home / 2,741.55-3,782.45-1,678.20

Finding the Fourth Proportional to 2,741.55, 3,782.45 and 1,678.20

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Solution

The fourth proportional to 2,741.55, 3,782.45 and 1,678.20 is: 2,315.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,741.55 : 3,782.45 = 1,678.20 : x
  2. Step 2: Convert to fraction form
    2,741.55/3,782.45 = 1,678.20/x
  3. Step 3: Cross multiply
    2,741.55x = 3,782.45 × 1,678.20
  4. Step 4: Simplify right side
    2,741.55x = 6,347,699.20
  5. Step 5: Solve for x
    x = 6,347,699.20/2,741.55
  6. Step 6: Final answer
    x = 2,315.37

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1.5x scale

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.