Home / 1,539.09-2,121.81-1,040.94

Finding the Fourth Proportional to 1,539.09, 2,121.81 and 1,040.94

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Solution

The fourth proportional to 1,539.09, 2,121.81 and 1,040.94 is: 1,435.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.09 : 2,121.81 = 1,040.94 : x
  2. Step 2: Convert to fraction form
    1,539.09/2,121.81 = 1,040.94/x
  3. Step 3: Cross multiply
    1,539.09x = 2,121.81 × 1,040.94
  4. Step 4: Simplify right side
    1,539.09x = 2,208,676.90
  5. Step 5: Solve for x
    x = 2,208,676.90/1,539.09
  6. Step 6: Final answer
    x = 1,435.05

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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.