Home / 1,418.63-2,123.67-767.39

Finding the Fourth Proportional to 1,418.63, 2,123.67 and 767.39

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Solution

The fourth proportional to 1,418.63, 2,123.67 and 767.39 is: 1,148.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.63 : 2,123.67 = 767.39 : x
  2. Step 2: Convert to fraction form
    1,418.63/2,123.67 = 767.39/x
  3. Step 3: Cross multiply
    1,418.63x = 2,123.67 × 767.39
  4. Step 4: Simplify right side
    1,418.63x = 1,629,683.12
  5. Step 5: Solve for x
    x = 1,629,683.12/1,418.63
  6. Step 6: Final answer
    x = 1,148.77

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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.