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Finding the Fourth Proportional to 667,552.68, 921,216.78 and 361,622.16

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Solution

The fourth proportional to 667,552.68, 921,216.78 and 361,622.16 is: 499,035.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,552.68 : 921,216.78 = 361,622.16 : x
  2. Step 2: Convert to fraction form
    667,552.68/921,216.78 = 361,622.16/x
  3. Step 3: Cross multiply
    667,552.68x = 921,216.78 × 361,622.16
  4. Step 4: Simplify right side
    667,552.68x = 333,132,401,811.85
  5. Step 5: Solve for x
    x = 333,132,401,811.85/667,552.68
  6. Step 6: Final answer
    x = 499,035.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.