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Finding the Fourth Proportional to 291.80, 402.46 and 193.39

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Solution

The fourth proportional to 291.80, 402.46 and 193.39 is: 266.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.80 : 402.46 = 193.39 : x
  2. Step 2: Convert to fraction form
    291.80/402.46 = 193.39/x
  3. Step 3: Cross multiply
    291.80x = 402.46 × 193.39
  4. Step 4: Simplify right side
    291.80x = 77,831.74
  5. Step 5: Solve for x
    x = 77,831.74/291.80
  6. Step 6: Final answer
    x = 266.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.