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Finding the Fourth Proportional to 741.74, 1,111.83 and 302.79

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Solution

The fourth proportional to 741.74, 1,111.83 and 302.79 is: 453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.74 : 1,111.83 = 302.79 : x
  2. Step 2: Convert to fraction form
    741.74/1,111.83 = 302.79/x
  3. Step 3: Cross multiply
    741.74x = 1,111.83 × 302.79
  4. Step 4: Simplify right side
    741.74x = 336,655.74
  5. Step 5: Solve for x
    x = 336,655.74/741.74
  6. Step 6: Final answer
    x = 453.88

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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.