Home / 1,311.46-1,966.59-445.54

Finding the Fourth Proportional to 1,311.46, 1,966.59 and 445.54

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Solution

The fourth proportional to 1,311.46, 1,966.59 and 445.54 is: 668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.46 : 1,966.59 = 445.54 : x
  2. Step 2: Convert to fraction form
    1,311.46/1,966.59 = 445.54/x
  3. Step 3: Cross multiply
    1,311.46x = 1,966.59 × 445.54
  4. Step 4: Simplify right side
    1,311.46x = 876,194.51
  5. Step 5: Solve for x
    x = 876,194.51/1,311.46
  6. Step 6: Final answer
    x = 668.11

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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.