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Finding the Fourth Proportional to 3,126.33, 4,689.45 and 786.33

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Solution

The fourth proportional to 3,126.33, 4,689.45 and 786.33 is: 1,179.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.33 : 4,689.45 = 786.33 : x
  2. Step 2: Convert to fraction form
    3,126.33/4,689.45 = 786.33/x
  3. Step 3: Cross multiply
    3,126.33x = 4,689.45 × 786.33
  4. Step 4: Simplify right side
    3,126.33x = 3,687,455.22
  5. Step 5: Solve for x
    x = 3,687,455.22/3,126.33
  6. Step 6: Final answer
    x = 1,179.48

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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.