Home / 1,453.78-2,178.34-1,415.34

Finding the Fourth Proportional to 1,453.78, 2,178.34 and 1,415.34

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Solution

The fourth proportional to 1,453.78, 2,178.34 and 1,415.34 is: 2,120.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.78 : 2,178.34 = 1,415.34 : x
  2. Step 2: Convert to fraction form
    1,453.78/2,178.34 = 1,415.34/x
  3. Step 3: Cross multiply
    1,453.78x = 2,178.34 × 1,415.34
  4. Step 4: Simplify right side
    1,453.78x = 3,083,073.77
  5. Step 5: Solve for x
    x = 3,083,073.77/1,453.78
  6. Step 6: Final answer
    x = 2,120.74

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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.