Home / 1,289.23-1,936.13-1,186.30

Finding the Fourth Proportional to 1,289.23, 1,936.13 and 1,186.30

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Solution

The fourth proportional to 1,289.23, 1,936.13 and 1,186.30 is: 1,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.23 : 1,936.13 = 1,186.30 : x
  2. Step 2: Convert to fraction form
    1,289.23/1,936.13 = 1,186.30/x
  3. Step 3: Cross multiply
    1,289.23x = 1,936.13 × 1,186.30
  4. Step 4: Simplify right side
    1,289.23x = 2,296,831.02
  5. Step 5: Solve for x
    x = 2,296,831.02/1,289.23
  6. Step 6: Final answer
    x = 1,781.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.