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Finding the Fourth Proportional to 342.25, 513.58 and 147.25

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Solution

The fourth proportional to 342.25, 513.58 and 147.25 is: 220.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.25 : 513.58 = 147.25 : x
  2. Step 2: Convert to fraction form
    342.25/513.58 = 147.25/x
  3. Step 3: Cross multiply
    342.25x = 513.58 × 147.25
  4. Step 4: Simplify right side
    342.25x = 75,621.72
  5. Step 5: Solve for x
    x = 75,621.72/342.25
  6. Step 6: Final answer
    x = 220.95

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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.