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Finding the Fourth Proportional to 288,384.60, 431,556.30 and 251,351.40

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Solution

The fourth proportional to 288,384.60, 431,556.30 and 251,351.40 is: 376,137.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,384.60 : 431,556.30 = 251,351.40 : x
  2. Step 2: Convert to fraction form
    288,384.60/431,556.30 = 251,351.40/x
  3. Step 3: Cross multiply
    288,384.60x = 431,556.30 × 251,351.40
  4. Step 4: Simplify right side
    288,384.60x = 108,472,280,183.82
  5. Step 5: Solve for x
    x = 108,472,280,183.82/288,384.60
  6. Step 6: Final answer
    x = 376,137.56

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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.