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Finding the Fourth Proportional to 3,609.93, 5,415.81 and 1,012.87

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Solution

The fourth proportional to 3,609.93, 5,415.81 and 1,012.87 is: 1,519.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.93 : 5,415.81 = 1,012.87 : x
  2. Step 2: Convert to fraction form
    3,609.93/5,415.81 = 1,012.87/x
  3. Step 3: Cross multiply
    3,609.93x = 5,415.81 × 1,012.87
  4. Step 4: Simplify right side
    3,609.93x = 5,485,511.47
  5. Step 5: Solve for x
    x = 5,485,511.47/3,609.93
  6. Step 6: Final answer
    x = 1,519.56

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1.5x scale

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.