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Finding the Fourth Proportional to 342.58, 513.45 and 169.12

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Solution

The fourth proportional to 342.58, 513.45 and 169.12 is: 253.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.58 : 513.45 = 169.12 : x
  2. Step 2: Convert to fraction form
    342.58/513.45 = 169.12/x
  3. Step 3: Cross multiply
    342.58x = 513.45 × 169.12
  4. Step 4: Simplify right side
    342.58x = 86,834.66
  5. Step 5: Solve for x
    x = 86,834.66/342.58
  6. Step 6: Final answer
    x = 253.47

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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.