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Finding the Fourth Proportional to 667,171.44, 920,323.08 and 394,973.76

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Solution

The fourth proportional to 667,171.44, 920,323.08 and 394,973.76 is: 544,842.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,171.44 : 920,323.08 = 394,973.76 : x
  2. Step 2: Convert to fraction form
    667,171.44/920,323.08 = 394,973.76/x
  3. Step 3: Cross multiply
    667,171.44x = 920,323.08 × 394,973.76
  4. Step 4: Simplify right side
    667,171.44x = 363,503,467,322.38
  5. Step 5: Solve for x
    x = 363,503,467,322.38/667,171.44
  6. Step 6: Final answer
    x = 544,842.67

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1.5x scale

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.