Home / 686,253.62-1,029,446.95-212,811.86

Finding the Fourth Proportional to 686,253.62, 1,029,446.95 and 212,811.86

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Solution

The fourth proportional to 686,253.62, 1,029,446.95 and 212,811.86 is: 319,238.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,253.62 : 1,029,446.95 = 212,811.86 : x
  2. Step 2: Convert to fraction form
    686,253.62/1,029,446.95 = 212,811.86/x
  3. Step 3: Cross multiply
    686,253.62x = 1,029,446.95 × 212,811.86
  4. Step 4: Simplify right side
    686,253.62x = 219,078,519,136.77
  5. Step 5: Solve for x
    x = 219,078,519,136.77/686,253.62
  6. Step 6: Final answer
    x = 319,238.42

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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.