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Finding the Fourth Proportional to 744.27, 1,116.68 and 257.37

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Solution

The fourth proportional to 744.27, 1,116.68 and 257.37 is: 386.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.27 : 1,116.68 = 257.37 : x
  2. Step 2: Convert to fraction form
    744.27/1,116.68 = 257.37/x
  3. Step 3: Cross multiply
    744.27x = 1,116.68 × 257.37
  4. Step 4: Simplify right side
    744.27x = 287,398.64
  5. Step 5: Solve for x
    x = 287,398.64/744.27
  6. Step 6: Final answer
    x = 386.15

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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.