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Finding the Fourth Proportional to 4,659.72, 6,979.50 and 2,190.84

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Solution

The fourth proportional to 4,659.72, 6,979.50 and 2,190.84 is: 3,281.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,659.72 : 6,979.50 = 2,190.84 : x
  2. Step 2: Convert to fraction form
    4,659.72/6,979.50 = 2,190.84/x
  3. Step 3: Cross multiply
    4,659.72x = 6,979.50 × 2,190.84
  4. Step 4: Simplify right side
    4,659.72x = 15,290,967.78
  5. Step 5: Solve for x
    x = 15,290,967.78/4,659.72
  6. Step 6: Final answer
    x = 3,281.52

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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.