Home / 1,245.08-1,867.79-423.13

Finding the Fourth Proportional to 1,245.08, 1,867.79 and 423.13

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Solution

The fourth proportional to 1,245.08, 1,867.79 and 423.13 is: 634.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.08 : 1,867.79 = 423.13 : x
  2. Step 2: Convert to fraction form
    1,245.08/1,867.79 = 423.13/x
  3. Step 3: Cross multiply
    1,245.08x = 1,867.79 × 423.13
  4. Step 4: Simplify right side
    1,245.08x = 790,315.87
  5. Step 5: Solve for x
    x = 790,315.87/1,245.08
  6. Step 6: Final answer
    x = 634.75

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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.