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Finding the Fourth Proportional to 1,768.12, 2,651.80 and 672.12

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Solution

The fourth proportional to 1,768.12, 2,651.80 and 672.12 is: 1,008.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.12 : 2,651.80 = 672.12 : x
  2. Step 2: Convert to fraction form
    1,768.12/2,651.80 = 672.12/x
  3. Step 3: Cross multiply
    1,768.12x = 2,651.80 × 672.12
  4. Step 4: Simplify right side
    1,768.12x = 1,782,327.82
  5. Step 5: Solve for x
    x = 1,782,327.82/1,768.12
  6. Step 6: Final answer
    x = 1,008.04

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1.5x scale

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.