Home / 3,231.20-4,459.91-1,905.79

Finding the Fourth Proportional to 3,231.20, 4,459.91 and 1,905.79

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Solution

The fourth proportional to 3,231.20, 4,459.91 and 1,905.79 is: 2,630.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,231.20 : 4,459.91 = 1,905.79 : x
  2. Step 2: Convert to fraction form
    3,231.20/4,459.91 = 1,905.79/x
  3. Step 3: Cross multiply
    3,231.20x = 4,459.91 × 1,905.79
  4. Step 4: Simplify right side
    3,231.20x = 8,499,631.20
  5. Step 5: Solve for x
    x = 8,499,631.20/3,231.20
  6. Step 6: Final answer
    x = 2,630.49

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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.