Home / 287,986.20-431,396.10-199,339.80

Finding the Fourth Proportional to 287,986.20, 431,396.10 and 199,339.80

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Solution

The fourth proportional to 287,986.20, 431,396.10 and 199,339.80 is: 298,606.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,986.20 : 431,396.10 = 199,339.80 : x
  2. Step 2: Convert to fraction form
    287,986.20/431,396.10 = 199,339.80/x
  3. Step 3: Cross multiply
    287,986.20x = 431,396.10 × 199,339.80
  4. Step 4: Simplify right side
    287,986.20x = 85,994,412,294.78
  5. Step 5: Solve for x
    x = 85,994,412,294.78/287,986.20
  6. Step 6: Final answer
    x = 298,606.02

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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.