Home / 287,981.20-431,388.60-199,334.80

Finding the Fourth Proportional to 287,981.20, 431,388.60 and 199,334.80

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Solution

The fourth proportional to 287,981.20, 431,388.60 and 199,334.80 is: 298,598.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,981.20 : 431,388.60 = 199,334.80 : x
  2. Step 2: Convert to fraction form
    287,981.20/431,388.60 = 199,334.80/x
  3. Step 3: Cross multiply
    287,981.20x = 431,388.60 × 199,334.80
  4. Step 4: Simplify right side
    287,981.20x = 85,990,760,303.28
  5. Step 5: Solve for x
    x = 85,990,760,303.28/287,981.20
  6. Step 6: Final answer
    x = 298,598.52

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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.