Home / 1,316.96-1,975.44-667.88

Finding the Fourth Proportional to 1,316.96, 1,975.44 and 667.88

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Solution

The fourth proportional to 1,316.96, 1,975.44 and 667.88 is: 1,001.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.96 : 1,975.44 = 667.88 : x
  2. Step 2: Convert to fraction form
    1,316.96/1,975.44 = 667.88/x
  3. Step 3: Cross multiply
    1,316.96x = 1,975.44 × 667.88
  4. Step 4: Simplify right side
    1,316.96x = 1,319,356.87
  5. Step 5: Solve for x
    x = 1,319,356.87/1,316.96
  6. Step 6: Final answer
    x = 1,001.82

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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.