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Finding the Fourth Proportional to 1,196.63, 1,651.44 and 672.74

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Solution

The fourth proportional to 1,196.63, 1,651.44 and 672.74 is: 928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,196.63 : 1,651.44 = 672.74 : x
  2. Step 2: Convert to fraction form
    1,196.63/1,651.44 = 672.74/x
  3. Step 3: Cross multiply
    1,196.63x = 1,651.44 × 672.74
  4. Step 4: Simplify right side
    1,196.63x = 1,110,989.75
  5. Step 5: Solve for x
    x = 1,110,989.75/1,196.63
  6. Step 6: Final answer
    x = 928.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.