Home / 1,415.35-2,120.19-675.68

Finding the Fourth Proportional to 1,415.35, 2,120.19 and 675.68

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Solution

The fourth proportional to 1,415.35, 2,120.19 and 675.68 is: 1,012.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.35 : 2,120.19 = 675.68 : x
  2. Step 2: Convert to fraction form
    1,415.35/2,120.19 = 675.68/x
  3. Step 3: Cross multiply
    1,415.35x = 2,120.19 × 675.68
  4. Step 4: Simplify right side
    1,415.35x = 1,432,560.65
  5. Step 5: Solve for x
    x = 1,432,560.65/1,415.35
  6. Step 6: Final answer
    x = 1,012.16

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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.