Home / 1,318.88-1,975.59-668.25

Finding the Fourth Proportional to 1,318.88, 1,975.59 and 668.25

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Solution

The fourth proportional to 1,318.88, 1,975.59 and 668.25 is: 1,000.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.88 : 1,975.59 = 668.25 : x
  2. Step 2: Convert to fraction form
    1,318.88/1,975.59 = 668.25/x
  3. Step 3: Cross multiply
    1,318.88x = 1,975.59 × 668.25
  4. Step 4: Simplify right side
    1,318.88x = 1,320,188.02
  5. Step 5: Solve for x
    x = 1,320,188.02/1,318.88
  6. Step 6: Final answer
    x = 1,000.99

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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.