Home / 687,773.40-1,031,805.90-207,961.80

Finding the Fourth Proportional to 687,773.40, 1,031,805.90 and 207,961.80

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Solution

The fourth proportional to 687,773.40, 1,031,805.90 and 207,961.80 is: 311,986.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,773.40 : 1,031,805.90 = 207,961.80 : x
  2. Step 2: Convert to fraction form
    687,773.40/1,031,805.90 = 207,961.80/x
  3. Step 3: Cross multiply
    687,773.40x = 1,031,805.90 × 207,961.80
  4. Step 4: Simplify right side
    687,773.40x = 214,576,212,214.62
  5. Step 5: Solve for x
    x = 214,576,212,214.62/687,773.40
  6. Step 6: Final answer
    x = 311,986.79

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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.