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Finding the Fourth Proportional to 445,640.88, 668,572.02 and 221,106.72

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Solution

The fourth proportional to 445,640.88, 668,572.02 and 221,106.72 is: 331,715.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,640.88 : 668,572.02 = 221,106.72 : x
  2. Step 2: Convert to fraction form
    445,640.88/668,572.02 = 221,106.72/x
  3. Step 3: Cross multiply
    445,640.88x = 668,572.02 × 221,106.72
  4. Step 4: Simplify right side
    445,640.88x = 147,825,766,425.97
  5. Step 5: Solve for x
    x = 147,825,766,425.97/445,640.88
  6. Step 6: Final answer
    x = 331,715.00

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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.