Home / 686,404.80-1,029,704.40-213,040.80

Finding the Fourth Proportional to 686,404.80, 1,029,704.40 and 213,040.80

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Solution

The fourth proportional to 686,404.80, 1,029,704.40 and 213,040.80 is: 319,591.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,404.80 : 1,029,704.40 = 213,040.80 : x
  2. Step 2: Convert to fraction form
    686,404.80/1,029,704.40 = 213,040.80/x
  3. Step 3: Cross multiply
    686,404.80x = 1,029,704.40 × 213,040.80
  4. Step 4: Simplify right side
    686,404.80x = 219,369,049,139.52
  5. Step 5: Solve for x
    x = 219,369,049,139.52/686,404.80
  6. Step 6: Final answer
    x = 319,591.37

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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.