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Finding the Fourth Proportional to 2,386.81, 3,580.49 and 826.96

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Solution

The fourth proportional to 2,386.81, 3,580.49 and 826.96 is: 1,240.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,386.81 : 3,580.49 = 826.96 : x
  2. Step 2: Convert to fraction form
    2,386.81/3,580.49 = 826.96/x
  3. Step 3: Cross multiply
    2,386.81x = 3,580.49 × 826.96
  4. Step 4: Simplify right side
    2,386.81x = 2,960,922.01
  5. Step 5: Solve for x
    x = 2,960,922.01/2,386.81
  6. Step 6: Final answer
    x = 1,240.54

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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.