Home / 1,194.04-1,647.78-821.80

Finding the Fourth Proportional to 1,194.04, 1,647.78 and 821.80

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Solution

The fourth proportional to 1,194.04, 1,647.78 and 821.80 is: 1,134.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.04 : 1,647.78 = 821.80 : x
  2. Step 2: Convert to fraction form
    1,194.04/1,647.78 = 821.80/x
  3. Step 3: Cross multiply
    1,194.04x = 1,647.78 × 821.80
  4. Step 4: Simplify right side
    1,194.04x = 1,354,145.60
  5. Step 5: Solve for x
    x = 1,354,145.60/1,194.04
  6. Step 6: Final answer
    x = 1,134.09

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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.