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Finding the Fourth Proportional to 741.37, 1,112.25 and 279.16

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Solution

The fourth proportional to 741.37, 1,112.25 and 279.16 is: 418.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.37 : 1,112.25 = 279.16 : x
  2. Step 2: Convert to fraction form
    741.37/1,112.25 = 279.16/x
  3. Step 3: Cross multiply
    741.37x = 1,112.25 × 279.16
  4. Step 4: Simplify right side
    741.37x = 310,492.24
  5. Step 5: Solve for x
    x = 310,492.24/741.37
  6. Step 6: Final answer
    x = 418.81

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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.