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Finding the Fourth Proportional to 794.34, 1,191.96 and 429.12

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Solution

The fourth proportional to 794.34, 1,191.96 and 429.12 is: 643.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.34 : 1,191.96 = 429.12 : x
  2. Step 2: Convert to fraction form
    794.34/1,191.96 = 429.12/x
  3. Step 3: Cross multiply
    794.34x = 1,191.96 × 429.12
  4. Step 4: Simplify right side
    794.34x = 511,493.88
  5. Step 5: Solve for x
    x = 511,493.88/794.34
  6. Step 6: Final answer
    x = 643.92

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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.