Home / 1,212.58-1,819.20-432.76

Finding the Fourth Proportional to 1,212.58, 1,819.20 and 432.76

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Solution

The fourth proportional to 1,212.58, 1,819.20 and 432.76 is: 649.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.58 : 1,819.20 = 432.76 : x
  2. Step 2: Convert to fraction form
    1,212.58/1,819.20 = 432.76/x
  3. Step 3: Cross multiply
    1,212.58x = 1,819.20 × 432.76
  4. Step 4: Simplify right side
    1,212.58x = 787,276.99
  5. Step 5: Solve for x
    x = 787,276.99/1,212.58
  6. Step 6: Final answer
    x = 649.26

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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.