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Finding the Fourth Proportional to 741.72, 1,113.01 and 330.90

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Solution

The fourth proportional to 741.72, 1,113.01 and 330.90 is: 496.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.72 : 1,113.01 = 330.90 : x
  2. Step 2: Convert to fraction form
    741.72/1,113.01 = 330.90/x
  3. Step 3: Cross multiply
    741.72x = 1,113.01 × 330.90
  4. Step 4: Simplify right side
    741.72x = 368,295.01
  5. Step 5: Solve for x
    x = 368,295.01/741.72
  6. Step 6: Final answer
    x = 496.54

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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.