Home / 3,240.16-4,861.91-1,390.79

Finding the Fourth Proportional to 3,240.16, 4,861.91 and 1,390.79

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Solution

The fourth proportional to 3,240.16, 4,861.91 and 1,390.79 is: 2,086.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.16 : 4,861.91 = 1,390.79 : x
  2. Step 2: Convert to fraction form
    3,240.16/4,861.91 = 1,390.79/x
  3. Step 3: Cross multiply
    3,240.16x = 4,861.91 × 1,390.79
  4. Step 4: Simplify right side
    3,240.16x = 6,761,895.81
  5. Step 5: Solve for x
    x = 6,761,895.81/3,240.16
  6. Step 6: Final answer
    x = 2,086.90

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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.