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Finding the Fourth Proportional to 1,072.78, 1,609.88 and 488.47

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Solution

The fourth proportional to 1,072.78, 1,609.88 and 488.47 is: 733.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.78 : 1,609.88 = 488.47 : x
  2. Step 2: Convert to fraction form
    1,072.78/1,609.88 = 488.47/x
  3. Step 3: Cross multiply
    1,072.78x = 1,609.88 × 488.47
  4. Step 4: Simplify right side
    1,072.78x = 786,378.08
  5. Step 5: Solve for x
    x = 786,378.08/1,072.78
  6. Step 6: Final answer
    x = 733.03

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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.