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Finding the Fourth Proportional to 445,515.76, 668,273.46 and 129,972.52

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Solution

The fourth proportional to 445,515.76, 668,273.46 and 129,972.52 is: 194,958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,515.76 : 668,273.46 = 129,972.52 : x
  2. Step 2: Convert to fraction form
    445,515.76/668,273.46 = 129,972.52/x
  3. Step 3: Cross multiply
    445,515.76x = 668,273.46 × 129,972.52
  4. Step 4: Simplify right side
    445,515.76x = 86,857,185,645.32
  5. Step 5: Solve for x
    x = 86,857,185,645.32/445,515.76
  6. Step 6: Final answer
    x = 194,958.73

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1.5x scale

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.