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Finding the Fourth Proportional to 718.33, 991.93 and 453.25

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Solution

The fourth proportional to 718.33, 991.93 and 453.25 is: 625.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.33 : 991.93 = 453.25 : x
  2. Step 2: Convert to fraction form
    718.33/991.93 = 453.25/x
  3. Step 3: Cross multiply
    718.33x = 991.93 × 453.25
  4. Step 4: Simplify right side
    718.33x = 449,587.65
  5. Step 5: Solve for x
    x = 449,587.65/718.33
  6. Step 6: Final answer
    x = 625.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.