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Finding the Fourth Proportional to 2,426.69, 3,640.07 and 783.24

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Solution

The fourth proportional to 2,426.69, 3,640.07 and 783.24 is: 1,174.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,426.69 : 3,640.07 = 783.24 : x
  2. Step 2: Convert to fraction form
    2,426.69/3,640.07 = 783.24/x
  3. Step 3: Cross multiply
    2,426.69x = 3,640.07 × 783.24
  4. Step 4: Simplify right side
    2,426.69x = 2,851,048.43
  5. Step 5: Solve for x
    x = 2,851,048.43/2,426.69
  6. Step 6: Final answer
    x = 1,174.87

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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.