Home / 687,229.40-1,031,245.97-287,836.72

Finding the Fourth Proportional to 687,229.40, 1,031,245.97 and 287,836.72

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Solution

The fourth proportional to 687,229.40, 1,031,245.97 and 287,836.72 is: 431,923.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,229.40 : 1,031,245.97 = 287,836.72 : x
  2. Step 2: Convert to fraction form
    687,229.40/1,031,245.97 = 287,836.72/x
  3. Step 3: Cross multiply
    687,229.40x = 1,031,245.97 × 287,836.72
  4. Step 4: Simplify right side
    687,229.40x = 296,830,453,500.72
  5. Step 5: Solve for x
    x = 296,830,453,500.72/687,229.40
  6. Step 6: Final answer
    x = 431,923.39

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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.