Home / 1,119.13-1,544.49-621.80

Finding the Fourth Proportional to 1,119.13, 1,544.49 and 621.80

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Solution

The fourth proportional to 1,119.13, 1,544.49 and 621.80 is: 858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.13 : 1,544.49 = 621.80 : x
  2. Step 2: Convert to fraction form
    1,119.13/1,544.49 = 621.80/x
  3. Step 3: Cross multiply
    1,119.13x = 1,544.49 × 621.80
  4. Step 4: Simplify right side
    1,119.13x = 960,363.88
  5. Step 5: Solve for x
    x = 960,363.88/1,119.13
  6. Step 6: Final answer
    x = 858.13

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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.