Home / 1,245.39-1,867.64-423.45

Finding the Fourth Proportional to 1,245.39, 1,867.64 and 423.45

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Solution

The fourth proportional to 1,245.39, 1,867.64 and 423.45 is: 635.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.39 : 1,867.64 = 423.45 : x
  2. Step 2: Convert to fraction form
    1,245.39/1,867.64 = 423.45/x
  3. Step 3: Cross multiply
    1,245.39x = 1,867.64 × 423.45
  4. Step 4: Simplify right side
    1,245.39x = 790,850.04
  5. Step 5: Solve for x
    x = 790,850.04/1,245.39
  6. Step 6: Final answer
    x = 635.02

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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.