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Finding the Fourth Proportional to 614,121.72, 920,059.88 and 445,223.76

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Solution

The fourth proportional to 614,121.72, 920,059.88 and 445,223.76 is: 667,021.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,121.72 : 920,059.88 = 445,223.76 : x
  2. Step 2: Convert to fraction form
    614,121.72/920,059.88 = 445,223.76/x
  3. Step 3: Cross multiply
    614,121.72x = 920,059.88 × 445,223.76
  4. Step 4: Simplify right side
    614,121.72x = 409,632,519,198.75
  5. Step 5: Solve for x
    x = 409,632,519,198.75/614,121.72
  6. Step 6: Final answer
    x = 667,021.71

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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.