Home / 1,889.20-2,606.56-1,190.17

Finding the Fourth Proportional to 1,889.20, 2,606.56 and 1,190.17

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Solution

The fourth proportional to 1,889.20, 2,606.56 and 1,190.17 is: 1,642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.20 : 2,606.56 = 1,190.17 : x
  2. Step 2: Convert to fraction form
    1,889.20/2,606.56 = 1,190.17/x
  3. Step 3: Cross multiply
    1,889.20x = 2,606.56 × 1,190.17
  4. Step 4: Simplify right side
    1,889.20x = 3,102,249.52
  5. Step 5: Solve for x
    x = 3,102,249.52/1,889.20
  6. Step 6: Final answer
    x = 1,642.10

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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.