Home / 1,722.18-2,581.32-1,415.40

Finding the Fourth Proportional to 1,722.18, 2,581.32 and 1,415.40

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Solution

The fourth proportional to 1,722.18, 2,581.32 and 1,415.40 is: 2,121.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.18 : 2,581.32 = 1,415.40 : x
  2. Step 2: Convert to fraction form
    1,722.18/2,581.32 = 1,415.40/x
  3. Step 3: Cross multiply
    1,722.18x = 2,581.32 × 1,415.40
  4. Step 4: Simplify right side
    1,722.18x = 3,653,600.33
  5. Step 5: Solve for x
    x = 3,653,600.33/1,722.18
  6. Step 6: Final answer
    x = 2,121.50

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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.