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Finding the Fourth Proportional to 768,121.32, 1,059,711.78 and 481,141.80

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Solution

The fourth proportional to 768,121.32, 1,059,711.78 and 481,141.80 is: 663,790.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,121.32 : 1,059,711.78 = 481,141.80 : x
  2. Step 2: Convert to fraction form
    768,121.32/1,059,711.78 = 481,141.80/x
  3. Step 3: Cross multiply
    768,121.32x = 1,059,711.78 × 481,141.80
  4. Step 4: Simplify right side
    768,121.32x = 509,871,633,310.40
  5. Step 5: Solve for x
    x = 509,871,633,310.40/768,121.32
  6. Step 6: Final answer
    x = 663,790.50

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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.