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Finding the Fourth Proportional to 1,087.57, 1,629.72 and 1,006.57

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Solution

The fourth proportional to 1,087.57, 1,629.72 and 1,006.57 is: 1,508.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.57 : 1,629.72 = 1,006.57 : x
  2. Step 2: Convert to fraction form
    1,087.57/1,629.72 = 1,006.57/x
  3. Step 3: Cross multiply
    1,087.57x = 1,629.72 × 1,006.57
  4. Step 4: Simplify right side
    1,087.57x = 1,640,427.26
  5. Step 5: Solve for x
    x = 1,640,427.26/1,087.57
  6. Step 6: Final answer
    x = 1,508.34

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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.