Home / 1,890.44-2,609.52-1,397.05

Finding the Fourth Proportional to 1,890.44, 2,609.52 and 1,397.05

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Solution

The fourth proportional to 1,890.44, 2,609.52 and 1,397.05 is: 1,928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.44 : 2,609.52 = 1,397.05 : x
  2. Step 2: Convert to fraction form
    1,890.44/2,609.52 = 1,397.05/x
  3. Step 3: Cross multiply
    1,890.44x = 2,609.52 × 1,397.05
  4. Step 4: Simplify right side
    1,890.44x = 3,645,618.15
  5. Step 5: Solve for x
    x = 3,645,618.15/1,890.44
  6. Step 6: Final answer
    x = 1,928.45

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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.