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Finding the Fourth Proportional to 794.41, 1,191.93 and 424.21

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Solution

The fourth proportional to 794.41, 1,191.93 and 424.21 is: 636.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.41 : 1,191.93 = 424.21 : x
  2. Step 2: Convert to fraction form
    794.41/1,191.93 = 424.21/x
  3. Step 3: Cross multiply
    794.41x = 1,191.93 × 424.21
  4. Step 4: Simplify right side
    794.41x = 505,628.63
  5. Step 5: Solve for x
    x = 505,628.63/794.41
  6. Step 6: Final answer
    x = 636.48

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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.