Home / 1,539.29-2,124.47-979.18

Finding the Fourth Proportional to 1,539.29, 2,124.47 and 979.18

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Solution

The fourth proportional to 1,539.29, 2,124.47 and 979.18 is: 1,351.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.29 : 2,124.47 = 979.18 : x
  2. Step 2: Convert to fraction form
    1,539.29/2,124.47 = 979.18/x
  3. Step 3: Cross multiply
    1,539.29x = 2,124.47 × 979.18
  4. Step 4: Simplify right side
    1,539.29x = 2,080,228.33
  5. Step 5: Solve for x
    x = 2,080,228.33/1,539.29
  6. Step 6: Final answer
    x = 1,351.42

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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.