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Finding the Fourth Proportional to 1,179.99, 1,628.46 and 682.79

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Solution

The fourth proportional to 1,179.99, 1,628.46 and 682.79 is: 942.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.99 : 1,628.46 = 682.79 : x
  2. Step 2: Convert to fraction form
    1,179.99/1,628.46 = 682.79/x
  3. Step 3: Cross multiply
    1,179.99x = 1,628.46 × 682.79
  4. Step 4: Simplify right side
    1,179.99x = 1,111,888.06
  5. Step 5: Solve for x
    x = 1,111,888.06/1,179.99
  6. Step 6: Final answer
    x = 942.29

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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.