Home / 1,190.84-1,786.08-421.34

Finding the Fourth Proportional to 1,190.84, 1,786.08 and 421.34

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Solution

The fourth proportional to 1,190.84, 1,786.08 and 421.34 is: 631.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.84 : 1,786.08 = 421.34 : x
  2. Step 2: Convert to fraction form
    1,190.84/1,786.08 = 421.34/x
  3. Step 3: Cross multiply
    1,190.84x = 1,786.08 × 421.34
  4. Step 4: Simplify right side
    1,190.84x = 752,546.95
  5. Step 5: Solve for x
    x = 752,546.95/1,190.84
  6. Step 6: Final answer
    x = 631.95

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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.