Home / 1,619.78-2,225.61-1,287.63

Finding the Fourth Proportional to 1,619.78, 2,225.61 and 1,287.63

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Solution

The fourth proportional to 1,619.78, 2,225.61 and 1,287.63 is: 1,769.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.78 : 2,225.61 = 1,287.63 : x
  2. Step 2: Convert to fraction form
    1,619.78/2,225.61 = 1,287.63/x
  3. Step 3: Cross multiply
    1,619.78x = 2,225.61 × 1,287.63
  4. Step 4: Simplify right side
    1,619.78x = 2,865,770.99
  5. Step 5: Solve for x
    x = 2,865,770.99/1,619.78
  6. Step 6: Final answer
    x = 1,769.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.