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Finding the Fourth Proportional to 741.41, 1,111.87 and 330.91

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Solution

The fourth proportional to 741.41, 1,111.87 and 330.91 is: 496.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.41 : 1,111.87 = 330.91 : x
  2. Step 2: Convert to fraction form
    741.41/1,111.87 = 330.91/x
  3. Step 3: Cross multiply
    741.41x = 1,111.87 × 330.91
  4. Step 4: Simplify right side
    741.41x = 367,925.29
  5. Step 5: Solve for x
    x = 367,925.29/741.41
  6. Step 6: Final answer
    x = 496.25

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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.