Home / 687,791.40-1,031,832.90-207,979.80

Finding the Fourth Proportional to 687,791.40, 1,031,832.90 and 207,979.80

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Solution

The fourth proportional to 687,791.40, 1,031,832.90 and 207,979.80 is: 312,013.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,791.40 : 1,031,832.90 = 207,979.80 : x
  2. Step 2: Convert to fraction form
    687,791.40/1,031,832.90 = 207,979.80/x
  3. Step 3: Cross multiply
    687,791.40x = 1,031,832.90 × 207,979.80
  4. Step 4: Simplify right side
    687,791.40x = 214,600,400,175.42
  5. Step 5: Solve for x
    x = 214,600,400,175.42/687,791.40
  6. Step 6: Final answer
    x = 312,013.79

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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.