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Finding the Fourth Proportional to 1,636.48, 2,455.44 and 711.60

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Solution

The fourth proportional to 1,636.48, 2,455.44 and 711.60 is: 1,067.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.48 : 2,455.44 = 711.60 : x
  2. Step 2: Convert to fraction form
    1,636.48/2,455.44 = 711.60/x
  3. Step 3: Cross multiply
    1,636.48x = 2,455.44 × 711.60
  4. Step 4: Simplify right side
    1,636.48x = 1,747,291.10
  5. Step 5: Solve for x
    x = 1,747,291.10/1,636.48
  6. Step 6: Final answer
    x = 1,067.71

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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.