Home / 687,801.40-1,031,847.90-207,989.80

Finding the Fourth Proportional to 687,801.40, 1,031,847.90 and 207,989.80

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Solution

The fourth proportional to 687,801.40, 1,031,847.90 and 207,989.80 is: 312,028.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,801.40 : 1,031,847.90 = 207,989.80 : x
  2. Step 2: Convert to fraction form
    687,801.40/1,031,847.90 = 207,989.80/x
  3. Step 3: Cross multiply
    687,801.40x = 1,031,847.90 × 207,989.80
  4. Step 4: Simplify right side
    687,801.40x = 214,613,838,351.42
  5. Step 5: Solve for x
    x = 214,613,838,351.42/687,801.40
  6. Step 6: Final answer
    x = 312,028.79

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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.