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Finding the Fourth Proportional to 667,796.14, 921,379.35 and 381,259.18

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Solution

The fourth proportional to 667,796.14, 921,379.35 and 381,259.18 is: 526,035.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,796.14 : 921,379.35 = 381,259.18 : x
  2. Step 2: Convert to fraction form
    667,796.14/921,379.35 = 381,259.18/x
  3. Step 3: Cross multiply
    667,796.14x = 921,379.35 × 381,259.18
  4. Step 4: Simplify right side
    667,796.14x = 351,284,335,449.93
  5. Step 5: Solve for x
    x = 351,284,335,449.93/667,796.14
  6. Step 6: Final answer
    x = 526,035.29

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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.