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Finding the Fourth Proportional to 1,072.88, 1,609.48 and 342.62

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Solution

The fourth proportional to 1,072.88, 1,609.48 and 342.62 is: 513.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.88 : 1,609.48 = 342.62 : x
  2. Step 2: Convert to fraction form
    1,072.88/1,609.48 = 342.62/x
  3. Step 3: Cross multiply
    1,072.88x = 1,609.48 × 342.62
  4. Step 4: Simplify right side
    1,072.88x = 551,440.04
  5. Step 5: Solve for x
    x = 551,440.04/1,072.88
  6. Step 6: Final answer
    x = 513.98

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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.