Home / 1,890.56-2,608.13-1,260.47

Finding the Fourth Proportional to 1,890.56, 2,608.13 and 1,260.47

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Solution

The fourth proportional to 1,890.56, 2,608.13 and 1,260.47 is: 1,738.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.56 : 2,608.13 = 1,260.47 : x
  2. Step 2: Convert to fraction form
    1,890.56/2,608.13 = 1,260.47/x
  3. Step 3: Cross multiply
    1,890.56x = 2,608.13 × 1,260.47
  4. Step 4: Simplify right side
    1,890.56x = 3,287,479.29
  5. Step 5: Solve for x
    x = 3,287,479.29/1,890.56
  6. Step 6: Final answer
    x = 1,738.89

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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.