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Finding the Fourth Proportional to 4,979.68, 7,469.70 and 1,692.88

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Solution

The fourth proportional to 4,979.68, 7,469.70 and 1,692.88 is: 2,539.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.68 : 7,469.70 = 1,692.88 : x
  2. Step 2: Convert to fraction form
    4,979.68/7,469.70 = 1,692.88/x
  3. Step 3: Cross multiply
    4,979.68x = 7,469.70 × 1,692.88
  4. Step 4: Simplify right side
    4,979.68x = 12,645,305.74
  5. Step 5: Solve for x
    x = 12,645,305.74/4,979.68
  6. Step 6: Final answer
    x = 2,539.38

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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.