Home / 1,245.52-1,868.36-423.84

Finding the Fourth Proportional to 1,245.52, 1,868.36 and 423.84

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Solution

The fourth proportional to 1,245.52, 1,868.36 and 423.84 is: 635.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.52 : 1,868.36 = 423.84 : x
  2. Step 2: Convert to fraction form
    1,245.52/1,868.36 = 423.84/x
  3. Step 3: Cross multiply
    1,245.52x = 1,868.36 × 423.84
  4. Step 4: Simplify right side
    1,245.52x = 791,885.70
  5. Step 5: Solve for x
    x = 791,885.70/1,245.52
  6. Step 6: Final answer
    x = 635.79

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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.