Home / 686,255.62-1,029,449.95-212,813.86

Finding the Fourth Proportional to 686,255.62, 1,029,449.95 and 212,813.86

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Solution

The fourth proportional to 686,255.62, 1,029,449.95 and 212,813.86 is: 319,241.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,255.62 : 1,029,449.95 = 212,813.86 : x
  2. Step 2: Convert to fraction form
    686,255.62/1,029,449.95 = 212,813.86/x
  3. Step 3: Cross multiply
    686,255.62x = 1,029,449.95 × 212,813.86
  4. Step 4: Simplify right side
    686,255.62x = 219,081,217,536.31
  5. Step 5: Solve for x
    x = 219,081,217,536.31/686,255.62
  6. Step 6: Final answer
    x = 319,241.42

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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.