Home / 1,394.20-1,928.58-1,299.64

Finding the Fourth Proportional to 1,394.20, 1,928.58 and 1,299.64

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Solution

The fourth proportional to 1,394.20, 1,928.58 and 1,299.64 is: 1,797.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.20 : 1,928.58 = 1,299.64 : x
  2. Step 2: Convert to fraction form
    1,394.20/1,928.58 = 1,299.64/x
  3. Step 3: Cross multiply
    1,394.20x = 1,928.58 × 1,299.64
  4. Step 4: Simplify right side
    1,394.20x = 2,506,459.71
  5. Step 5: Solve for x
    x = 2,506,459.71/1,394.20
  6. Step 6: Final answer
    x = 1,797.78

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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.