Home / 1,245.29-1,867.86-423.54

Finding the Fourth Proportional to 1,245.29, 1,867.86 and 423.54

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Solution

The fourth proportional to 1,245.29, 1,867.86 and 423.54 is: 635.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.29 : 1,867.86 = 423.54 : x
  2. Step 2: Convert to fraction form
    1,245.29/1,867.86 = 423.54/x
  3. Step 3: Cross multiply
    1,245.29x = 1,867.86 × 423.54
  4. Step 4: Simplify right side
    1,245.29x = 791,113.42
  5. Step 5: Solve for x
    x = 791,113.42/1,245.29
  6. Step 6: Final answer
    x = 635.29

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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.