Home / 1,316.79-1,975.91-667.58

Finding the Fourth Proportional to 1,316.79, 1,975.91 and 667.58

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Solution

The fourth proportional to 1,316.79, 1,975.91 and 667.58 is: 1,001.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.79 : 1,975.91 = 667.58 : x
  2. Step 2: Convert to fraction form
    1,316.79/1,975.91 = 667.58/x
  3. Step 3: Cross multiply
    1,316.79x = 1,975.91 × 667.58
  4. Step 4: Simplify right side
    1,316.79x = 1,319,064.78
  5. Step 5: Solve for x
    x = 1,319,064.78/1,316.79
  6. Step 6: Final answer
    x = 1,001.73

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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.