Home / 3,620.40-5,429.88-1,310.64

Finding the Fourth Proportional to 3,620.40, 5,429.88 and 1,310.64

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Solution

The fourth proportional to 3,620.40, 5,429.88 and 1,310.64 is: 1,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.40 : 5,429.88 = 1,310.64 : x
  2. Step 2: Convert to fraction form
    3,620.40/5,429.88 = 1,310.64/x
  3. Step 3: Cross multiply
    3,620.40x = 5,429.88 × 1,310.64
  4. Step 4: Simplify right side
    3,620.40x = 7,116,617.92
  5. Step 5: Solve for x
    x = 7,116,617.92/3,620.40
  6. Step 6: Final answer
    x = 1,965.70

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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.