Home / 1,245.44-1,868.08-423.69

Finding the Fourth Proportional to 1,245.44, 1,868.08 and 423.69

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Solution

The fourth proportional to 1,245.44, 1,868.08 and 423.69 is: 635.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.44 : 1,868.08 = 423.69 : x
  2. Step 2: Convert to fraction form
    1,245.44/1,868.08 = 423.69/x
  3. Step 3: Cross multiply
    1,245.44x = 1,868.08 × 423.69
  4. Step 4: Simplify right side
    1,245.44x = 791,486.82
  5. Step 5: Solve for x
    x = 791,486.82/1,245.44
  6. Step 6: Final answer
    x = 635.51

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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.