Home / 1,245.17-1,867.30-423.22

Finding the Fourth Proportional to 1,245.17, 1,867.30 and 423.22

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Solution

The fourth proportional to 1,245.17, 1,867.30 and 423.22 is: 634.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.17 : 1,867.30 = 423.22 : x
  2. Step 2: Convert to fraction form
    1,245.17/1,867.30 = 423.22/x
  3. Step 3: Cross multiply
    1,245.17x = 1,867.30 × 423.22
  4. Step 4: Simplify right side
    1,245.17x = 790,276.59
  5. Step 5: Solve for x
    x = 790,276.59/1,245.17
  6. Step 6: Final answer
    x = 634.68

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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.