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Finding the Fourth Proportional to 5,178.88, 7,764.64 and 1,667.80

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Solution

The fourth proportional to 5,178.88, 7,764.64 and 1,667.80 is: 2,500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.88 : 7,764.64 = 1,667.80 : x
  2. Step 2: Convert to fraction form
    5,178.88/7,764.64 = 1,667.80/x
  3. Step 3: Cross multiply
    5,178.88x = 7,764.64 × 1,667.80
  4. Step 4: Simplify right side
    5,178.88x = 12,949,866.59
  5. Step 5: Solve for x
    x = 12,949,866.59/5,178.88
  6. Step 6: Final answer
    x = 2,500.51

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1.5x scale

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.