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Finding the Fourth Proportional to 1,905.15, 2,857.73 and 672.27

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Solution

The fourth proportional to 1,905.15, 2,857.73 and 672.27 is: 1,008.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.15 : 2,857.73 = 672.27 : x
  2. Step 2: Convert to fraction form
    1,905.15/2,857.73 = 672.27/x
  3. Step 3: Cross multiply
    1,905.15x = 2,857.73 × 672.27
  4. Step 4: Simplify right side
    1,905.15x = 1,921,162.79
  5. Step 5: Solve for x
    x = 1,921,162.79/1,905.15
  6. Step 6: Final answer
    x = 1,008.41

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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.