Home / 1,285.32-1,923.80-668.14

Finding the Fourth Proportional to 1,285.32, 1,923.80 and 668.14

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Solution

The fourth proportional to 1,285.32, 1,923.80 and 668.14 is: 1,000.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.32 : 1,923.80 = 668.14 : x
  2. Step 2: Convert to fraction form
    1,285.32/1,923.80 = 668.14/x
  3. Step 3: Cross multiply
    1,285.32x = 1,923.80 × 668.14
  4. Step 4: Simplify right side
    1,285.32x = 1,285,367.73
  5. Step 5: Solve for x
    x = 1,285,367.73/1,285.32
  6. Step 6: Final answer
    x = 1,000.04

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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.