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Finding the Fourth Proportional to 742.52, 1,113.24 and 641

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Solution

The fourth proportional to 742.52, 1,113.24 and 641 is: 961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.52 : 1,113.24 = 641 : x
  2. Step 2: Convert to fraction form
    742.52/1,113.24 = 641/x
  3. Step 3: Cross multiply
    742.52x = 1,113.24 × 641
  4. Step 4: Simplify right side
    742.52x = 713,586.84
  5. Step 5: Solve for x
    x = 713,586.84/742.52
  6. Step 6: Final answer
    x = 961.03

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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.