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Finding the Fourth Proportional to 663,409.20, 915,504.94 and 376,929.66

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Solution

The fourth proportional to 663,409.20, 915,504.94 and 376,929.66 is: 520,163.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,409.20 : 915,504.94 = 376,929.66 : x
  2. Step 2: Convert to fraction form
    663,409.20/915,504.94 = 376,929.66/x
  3. Step 3: Cross multiply
    663,409.20x = 915,504.94 × 376,929.66
  4. Step 4: Simplify right side
    663,409.20x = 345,080,965,762.52
  5. Step 5: Solve for x
    x = 345,080,965,762.52/663,409.20
  6. Step 6: Final answer
    x = 520,163.07

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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.