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Finding the Fourth Proportional to 727.26, 1,090.70 and 316.31

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Solution

The fourth proportional to 727.26, 1,090.70 and 316.31 is: 474.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.26 : 1,090.70 = 316.31 : x
  2. Step 2: Convert to fraction form
    727.26/1,090.70 = 316.31/x
  3. Step 3: Cross multiply
    727.26x = 1,090.70 × 316.31
  4. Step 4: Simplify right side
    727.26x = 344,994.65
  5. Step 5: Solve for x
    x = 344,994.65/727.26
  6. Step 6: Final answer
    x = 474.37

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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.