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Finding the Fourth Proportional to 3,640.86, 5,461.29 and 1,692

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Solution

The fourth proportional to 3,640.86, 5,461.29 and 1,692 is: 2,538

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.86 : 5,461.29 = 1,692 : x
  2. Step 2: Convert to fraction form
    3,640.86/5,461.29 = 1,692/x
  3. Step 3: Cross multiply
    3,640.86x = 5,461.29 × 1,692
  4. Step 4: Simplify right side
    3,640.86x = 9,240,502.68
  5. Step 5: Solve for x
    x = 9,240,502.68/3,640.86
  6. Step 6: Final answer
    x = 2,538

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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.