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Finding the Fourth Proportional to 667,596.94, 921,320.67 and 381,209.02

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Solution

The fourth proportional to 667,596.94, 921,320.67 and 381,209.02 is: 526,089.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,596.94 : 921,320.67 = 381,209.02 : x
  2. Step 2: Convert to fraction form
    667,596.94/921,320.67 = 381,209.02/x
  3. Step 3: Cross multiply
    667,596.94x = 921,320.67 × 381,209.02
  4. Step 4: Simplify right side
    667,596.94x = 351,215,749,716.44
  5. Step 5: Solve for x
    x = 351,215,749,716.44/667,596.94
  6. Step 6: Final answer
    x = 526,089.51

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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.