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Finding the Fourth Proportional to 5,638, 7,780.44 and 3,154.48

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Solution

The fourth proportional to 5,638, 7,780.44 and 3,154.48 is: 4,353.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638 : 7,780.44 = 3,154.48 : x
  2. Step 2: Convert to fraction form
    5,638/7,780.44 = 3,154.48/x
  3. Step 3: Cross multiply
    5,638x = 7,780.44 × 3,154.48
  4. Step 4: Simplify right side
    5,638x = 24,543,242.37
  5. Step 5: Solve for x
    x = 24,543,242.37/5,638
  6. Step 6: Final answer
    x = 4,353.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.