Home / 1,246.21-1,869.30-321.76

Finding the Fourth Proportional to 1,246.21, 1,869.30 and 321.76

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Solution

The fourth proportional to 1,246.21, 1,869.30 and 321.76 is: 482.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.21 : 1,869.30 = 321.76 : x
  2. Step 2: Convert to fraction form
    1,246.21/1,869.30 = 321.76/x
  3. Step 3: Cross multiply
    1,246.21x = 1,869.30 × 321.76
  4. Step 4: Simplify right side
    1,246.21x = 601,458.69
  5. Step 5: Solve for x
    x = 601,458.69/1,246.21
  6. Step 6: Final answer
    x = 482.63

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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.