Home / 3,659.40-5,490.09-1,319.67

Finding the Fourth Proportional to 3,659.40, 5,490.09 and 1,319.67

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Solution

The fourth proportional to 3,659.40, 5,490.09 and 1,319.67 is: 1,979.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,659.40 : 5,490.09 = 1,319.67 : x
  2. Step 2: Convert to fraction form
    3,659.40/5,490.09 = 1,319.67/x
  3. Step 3: Cross multiply
    3,659.40x = 5,490.09 × 1,319.67
  4. Step 4: Simplify right side
    3,659.40x = 7,245,090.19
  5. Step 5: Solve for x
    x = 7,245,090.19/3,659.40
  6. Step 6: Final answer
    x = 1,979.86

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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.