Home / 1,245.25-1,867.95-379.57

Finding the Fourth Proportional to 1,245.25, 1,867.95 and 379.57

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Solution

The fourth proportional to 1,245.25, 1,867.95 and 379.57 is: 569.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.25 : 1,867.95 = 379.57 : x
  2. Step 2: Convert to fraction form
    1,245.25/1,867.95 = 379.57/x
  3. Step 3: Cross multiply
    1,245.25x = 1,867.95 × 379.57
  4. Step 4: Simplify right side
    1,245.25x = 709,017.78
  5. Step 5: Solve for x
    x = 709,017.78/1,245.25
  6. Step 6: Final answer
    x = 569.38

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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.