Home / 287,788.24-431,981.76-211,972.38

Finding the Fourth Proportional to 287,788.24, 431,981.76 and 211,972.38

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Solution

The fourth proportional to 287,788.24, 431,981.76 and 211,972.38 is: 318,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,788.24 : 431,981.76 = 211,972.38 : x
  2. Step 2: Convert to fraction form
    287,788.24/431,981.76 = 211,972.38/x
  3. Step 3: Cross multiply
    287,788.24x = 431,981.76 × 211,972.38
  4. Step 4: Simplify right side
    287,788.24x = 91,568,201,783.79
  5. Step 5: Solve for x
    x = 91,568,201,783.79/287,788.24
  6. Step 6: Final answer
    x = 318,179.10

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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.