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Finding the Fourth Proportional to 5,178.54, 7,144.82 and 4,679.58

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Solution

The fourth proportional to 5,178.54, 7,144.82 and 4,679.58 is: 6,456.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.54 : 7,144.82 = 4,679.58 : x
  2. Step 2: Convert to fraction form
    5,178.54/7,144.82 = 4,679.58/x
  3. Step 3: Cross multiply
    5,178.54x = 7,144.82 × 4,679.58
  4. Step 4: Simplify right side
    5,178.54x = 33,434,756.78
  5. Step 5: Solve for x
    x = 33,434,756.78/5,178.54
  6. Step 6: Final answer
    x = 6,456.41

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1.5x scale

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.