Home / 1,245.28-1,867.61-379.58

Finding the Fourth Proportional to 1,245.28, 1,867.61 and 379.58

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Solution

The fourth proportional to 1,245.28, 1,867.61 and 379.58 is: 569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.28 : 1,867.61 = 379.58 : x
  2. Step 2: Convert to fraction form
    1,245.28/1,867.61 = 379.58/x
  3. Step 3: Cross multiply
    1,245.28x = 1,867.61 × 379.58
  4. Step 4: Simplify right side
    1,245.28x = 708,907.40
  5. Step 5: Solve for x
    x = 708,907.40/1,245.28
  6. Step 6: Final answer
    x = 569.28

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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.