Home / 686,591.10-1,029,963.45-213,272.70

Finding the Fourth Proportional to 686,591.10, 1,029,963.45 and 213,272.70

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Solution

The fourth proportional to 686,591.10, 1,029,963.45 and 213,272.70 is: 319,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,591.10 : 1,029,963.45 = 213,272.70 : x
  2. Step 2: Convert to fraction form
    686,591.10/1,029,963.45 = 213,272.70/x
  3. Step 3: Cross multiply
    686,591.10x = 1,029,963.45 × 213,272.70
  4. Step 4: Simplify right side
    686,591.10x = 219,663,085,882.82
  5. Step 5: Solve for x
    x = 219,663,085,882.82/686,591.10
  6. Step 6: Final answer
    x = 319,932.91

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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.