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Finding the Fourth Proportional to 794.36, 1,191.50 and 274.40

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Solution

The fourth proportional to 794.36, 1,191.50 and 274.40 is: 411.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.36 : 1,191.50 = 274.40 : x
  2. Step 2: Convert to fraction form
    794.36/1,191.50 = 274.40/x
  3. Step 3: Cross multiply
    794.36x = 1,191.50 × 274.40
  4. Step 4: Simplify right side
    794.36x = 326,947.60
  5. Step 5: Solve for x
    x = 326,947.60/794.36
  6. Step 6: Final answer
    x = 411.59

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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.