Home / 1,285.43-1,928.64-668.75

Finding the Fourth Proportional to 1,285.43, 1,928.64 and 668.75

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Solution

The fourth proportional to 1,285.43, 1,928.64 and 668.75 is: 1,003.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.43 : 1,928.64 = 668.75 : x
  2. Step 2: Convert to fraction form
    1,285.43/1,928.64 = 668.75/x
  3. Step 3: Cross multiply
    1,285.43x = 1,928.64 × 668.75
  4. Step 4: Simplify right side
    1,285.43x = 1,289,778
  5. Step 5: Solve for x
    x = 1,289,778/1,285.43
  6. Step 6: Final answer
    x = 1,003.38

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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.