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Finding the Fourth Proportional to 742.84, 1,119.44 and 636.04

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Solution

The fourth proportional to 742.84, 1,119.44 and 636.04 is: 958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.84 : 1,119.44 = 636.04 : x
  2. Step 2: Convert to fraction form
    742.84/1,119.44 = 636.04/x
  3. Step 3: Cross multiply
    742.84x = 1,119.44 × 636.04
  4. Step 4: Simplify right side
    742.84x = 712,008.62
  5. Step 5: Solve for x
    x = 712,008.62/742.84
  6. Step 6: Final answer
    x = 958.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.