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Finding the Fourth Proportional to 794.29, 1,191.43 and 429.25

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Solution

The fourth proportional to 794.29, 1,191.43 and 429.25 is: 643.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.29 : 1,191.43 = 429.25 : x
  2. Step 2: Convert to fraction form
    794.29/1,191.43 = 429.25/x
  3. Step 3: Cross multiply
    794.29x = 1,191.43 × 429.25
  4. Step 4: Simplify right side
    794.29x = 511,421.33
  5. Step 5: Solve for x
    x = 511,421.33/794.29
  6. Step 6: Final answer
    x = 643.87

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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.