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Finding the Fourth Proportional to 741.68, 1,112.64 and 248.12

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Solution

The fourth proportional to 741.68, 1,112.64 and 248.12 is: 372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.68 : 1,112.64 = 248.12 : x
  2. Step 2: Convert to fraction form
    741.68/1,112.64 = 248.12/x
  3. Step 3: Cross multiply
    741.68x = 1,112.64 × 248.12
  4. Step 4: Simplify right side
    741.68x = 276,062.67
  5. Step 5: Solve for x
    x = 276,062.67/741.68
  6. Step 6: Final answer
    x = 372.22

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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.