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Finding the Fourth Proportional to 663,650.75, 915,838.25 and 377,163.47

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Solution

The fourth proportional to 663,650.75, 915,838.25 and 377,163.47 is: 520,485.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,650.75 : 915,838.25 = 377,163.47 : x
  2. Step 2: Convert to fraction form
    663,650.75/915,838.25 = 377,163.47/x
  3. Step 3: Cross multiply
    663,650.75x = 915,838.25 × 377,163.47
  4. Step 4: Simplify right side
    663,650.75x = 345,420,725,863.72
  5. Step 5: Solve for x
    x = 345,420,725,863.72/663,650.75
  6. Step 6: Final answer
    x = 520,485.70

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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.