Home / 685,491.92-1,028,281.44-212,137.52

Finding the Fourth Proportional to 685,491.92, 1,028,281.44 and 212,137.52

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Solution

The fourth proportional to 685,491.92, 1,028,281.44 and 212,137.52 is: 318,219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,491.92 : 1,028,281.44 = 212,137.52 : x
  2. Step 2: Convert to fraction form
    685,491.92/1,028,281.44 = 212,137.52/x
  3. Step 3: Cross multiply
    685,491.92x = 1,028,281.44 × 212,137.52
  4. Step 4: Simplify right side
    685,491.92x = 218,137,074,543.63
  5. Step 5: Solve for x
    x = 218,137,074,543.63/685,491.92
  6. Step 6: Final answer
    x = 318,219.76

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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.