Home / 1,245.38-1,868.25-379.58

Finding the Fourth Proportional to 1,245.38, 1,868.25 and 379.58

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Solution

The fourth proportional to 1,245.38, 1,868.25 and 379.58 is: 569.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.38 : 1,868.25 = 379.58 : x
  2. Step 2: Convert to fraction form
    1,245.38/1,868.25 = 379.58/x
  3. Step 3: Cross multiply
    1,245.38x = 1,868.25 × 379.58
  4. Step 4: Simplify right side
    1,245.38x = 709,150.34
  5. Step 5: Solve for x
    x = 709,150.34/1,245.38
  6. Step 6: Final answer
    x = 569.42

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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.