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Finding the Fourth Proportional to 741.79, 1,023.86 and 493.12

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Solution

The fourth proportional to 741.79, 1,023.86 and 493.12 is: 680.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.79 : 1,023.86 = 493.12 : x
  2. Step 2: Convert to fraction form
    741.79/1,023.86 = 493.12/x
  3. Step 3: Cross multiply
    741.79x = 1,023.86 × 493.12
  4. Step 4: Simplify right side
    741.79x = 504,885.84
  5. Step 5: Solve for x
    x = 504,885.84/741.79
  6. Step 6: Final answer
    x = 680.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.