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Finding the Fourth Proportional to 342.41, 513.22 and 156.90

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Solution

The fourth proportional to 342.41, 513.22 and 156.90 is: 235.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.41 : 513.22 = 156.90 : x
  2. Step 2: Convert to fraction form
    342.41/513.22 = 156.90/x
  3. Step 3: Cross multiply
    342.41x = 513.22 × 156.90
  4. Step 4: Simplify right side
    342.41x = 80,524.22
  5. Step 5: Solve for x
    x = 80,524.22/342.41
  6. Step 6: Final answer
    x = 235.17

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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.