Home / 685,492.92-1,028,282.94-212,138.52

Finding the Fourth Proportional to 685,492.92, 1,028,282.94 and 212,138.52

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Solution

The fourth proportional to 685,492.92, 1,028,282.94 and 212,138.52 is: 318,221.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,492.92 : 1,028,282.94 = 212,138.52 : x
  2. Step 2: Convert to fraction form
    685,492.92/1,028,282.94 = 212,138.52/x
  3. Step 3: Cross multiply
    685,492.92x = 1,028,282.94 × 212,138.52
  4. Step 4: Simplify right side
    685,492.92x = 218,138,421,032.85
  5. Step 5: Solve for x
    x = 218,138,421,032.85/685,492.92
  6. Step 6: Final answer
    x = 318,221.26

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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.