Home / 1,188.28-1,647.43-1,122.76

Finding the Fourth Proportional to 1,188.28, 1,647.43 and 1,122.76

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Solution

The fourth proportional to 1,188.28, 1,647.43 and 1,122.76 is: 1,556.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.28 : 1,647.43 = 1,122.76 : x
  2. Step 2: Convert to fraction form
    1,188.28/1,647.43 = 1,122.76/x
  3. Step 3: Cross multiply
    1,188.28x = 1,647.43 × 1,122.76
  4. Step 4: Simplify right side
    1,188.28x = 1,849,668.51
  5. Step 5: Solve for x
    x = 1,849,668.51/1,188.28
  6. Step 6: Final answer
    x = 1,556.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.