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Finding the Fourth Proportional to 796.40, 1,194.39 and 309.18

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Solution

The fourth proportional to 796.40, 1,194.39 and 309.18 is: 463.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.40 : 1,194.39 = 309.18 : x
  2. Step 2: Convert to fraction form
    796.40/1,194.39 = 309.18/x
  3. Step 3: Cross multiply
    796.40x = 1,194.39 × 309.18
  4. Step 4: Simplify right side
    796.40x = 369,281.50
  5. Step 5: Solve for x
    x = 369,281.50/796.40
  6. Step 6: Final answer
    x = 463.69

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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.