Home / 1,521.74-2,278.94-1,081.28

Finding the Fourth Proportional to 1,521.74, 2,278.94 and 1,081.28

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Solution

The fourth proportional to 1,521.74, 2,278.94 and 1,081.28 is: 1,619.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.74 : 2,278.94 = 1,081.28 : x
  2. Step 2: Convert to fraction form
    1,521.74/2,278.94 = 1,081.28/x
  3. Step 3: Cross multiply
    1,521.74x = 2,278.94 × 1,081.28
  4. Step 4: Simplify right side
    1,521.74x = 2,464,172.24
  5. Step 5: Solve for x
    x = 2,464,172.24/1,521.74
  6. Step 6: Final answer
    x = 1,619.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.