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Finding the Fourth Proportional to 342.29, 512.96 and 157.07

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Solution

The fourth proportional to 342.29, 512.96 and 157.07 is: 235.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.29 : 512.96 = 157.07 : x
  2. Step 2: Convert to fraction form
    342.29/512.96 = 157.07/x
  3. Step 3: Cross multiply
    342.29x = 512.96 × 157.07
  4. Step 4: Simplify right side
    342.29x = 80,567.28
  5. Step 5: Solve for x
    x = 80,567.28/342.29
  6. Step 6: Final answer
    x = 235.38

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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.