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Finding the Fourth Proportional to 3,640.84, 5,461.20 and 1,043.72

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Solution

The fourth proportional to 3,640.84, 5,461.20 and 1,043.72 is: 1,565.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.84 : 5,461.20 = 1,043.72 : x
  2. Step 2: Convert to fraction form
    3,640.84/5,461.20 = 1,043.72/x
  3. Step 3: Cross multiply
    3,640.84x = 5,461.20 × 1,043.72
  4. Step 4: Simplify right side
    3,640.84x = 5,699,963.66
  5. Step 5: Solve for x
    x = 5,699,963.66/3,640.84
  6. Step 6: Final answer
    x = 1,565.56

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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.