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Finding the Fourth Proportional to 1,446.39, 1,996.11 and 856.80

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Solution

The fourth proportional to 1,446.39, 1,996.11 and 856.80 is: 1,182.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.39 : 1,996.11 = 856.80 : x
  2. Step 2: Convert to fraction form
    1,446.39/1,996.11 = 856.80/x
  3. Step 3: Cross multiply
    1,446.39x = 1,996.11 × 856.80
  4. Step 4: Simplify right side
    1,446.39x = 1,710,267.05
  5. Step 5: Solve for x
    x = 1,710,267.05/1,446.39
  6. Step 6: Final answer
    x = 1,182.44

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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.