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Finding the Fourth Proportional to 667,450.12, 920,826.96 and 493,438.12

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Solution

The fourth proportional to 667,450.12, 920,826.96 and 493,438.12 is: 680,756.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,450.12 : 920,826.96 = 493,438.12 : x
  2. Step 2: Convert to fraction form
    667,450.12/920,826.96 = 493,438.12/x
  3. Step 3: Cross multiply
    667,450.12x = 920,826.96 × 493,438.12
  4. Step 4: Simplify right side
    667,450.12x = 454,371,123,987.72
  5. Step 5: Solve for x
    x = 454,371,123,987.72/667,450.12
  6. Step 6: Final answer
    x = 680,756.67

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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.