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Finding the Fourth Proportional to 1,149.05, 1,585.69 and 625.09

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Solution

The fourth proportional to 1,149.05, 1,585.69 and 625.09 is: 862.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.05 : 1,585.69 = 625.09 : x
  2. Step 2: Convert to fraction form
    1,149.05/1,585.69 = 625.09/x
  3. Step 3: Cross multiply
    1,149.05x = 1,585.69 × 625.09
  4. Step 4: Simplify right side
    1,149.05x = 991,198.96
  5. Step 5: Solve for x
    x = 991,198.96/1,149.05
  6. Step 6: Final answer
    x = 862.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.