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Finding the Fourth Proportional to 1,636.57, 2,455.54 and 711.66

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Solution

The fourth proportional to 1,636.57, 2,455.54 and 711.66 is: 1,067.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.57 : 2,455.54 = 711.66 : x
  2. Step 2: Convert to fraction form
    1,636.57/2,455.54 = 711.66/x
  3. Step 3: Cross multiply
    1,636.57x = 2,455.54 × 711.66
  4. Step 4: Simplify right side
    1,636.57x = 1,747,507.82
  5. Step 5: Solve for x
    x = 1,747,507.82/1,636.57
  6. Step 6: Final answer
    x = 1,067.79

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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.