Home / 2,274.96-3,139.21-1,390.58

Finding the Fourth Proportional to 2,274.96, 3,139.21 and 1,390.58

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Solution

The fourth proportional to 2,274.96, 3,139.21 and 1,390.58 is: 1,918.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.96 : 3,139.21 = 1,390.58 : x
  2. Step 2: Convert to fraction form
    2,274.96/3,139.21 = 1,390.58/x
  3. Step 3: Cross multiply
    2,274.96x = 3,139.21 × 1,390.58
  4. Step 4: Simplify right side
    2,274.96x = 4,365,322.64
  5. Step 5: Solve for x
    x = 4,365,322.64/2,274.96
  6. Step 6: Final answer
    x = 1,918.86

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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.