Home / 1,119.09-1,544.31-621.74

Finding the Fourth Proportional to 1,119.09, 1,544.31 and 621.74

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Solution

The fourth proportional to 1,119.09, 1,544.31 and 621.74 is: 857.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.09 : 1,544.31 = 621.74 : x
  2. Step 2: Convert to fraction form
    1,119.09/1,544.31 = 621.74/x
  3. Step 3: Cross multiply
    1,119.09x = 1,544.31 × 621.74
  4. Step 4: Simplify right side
    1,119.09x = 960,151.58
  5. Step 5: Solve for x
    x = 960,151.58/1,119.09
  6. Step 6: Final answer
    x = 857.98

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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.