Home / 1,189.48-1,771.97-1,118.56

Finding the Fourth Proportional to 1,189.48, 1,771.97 and 1,118.56

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Solution

The fourth proportional to 1,189.48, 1,771.97 and 1,118.56 is: 1,666.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.48 : 1,771.97 = 1,118.56 : x
  2. Step 2: Convert to fraction form
    1,189.48/1,771.97 = 1,118.56/x
  3. Step 3: Cross multiply
    1,189.48x = 1,771.97 × 1,118.56
  4. Step 4: Simplify right side
    1,189.48x = 1,982,054.76
  5. Step 5: Solve for x
    x = 1,982,054.76/1,189.48
  6. Step 6: Final answer
    x = 1,666.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.