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Finding the Fourth Proportional to 667,252.21, 920,873.91 and 380,815.15

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Solution

The fourth proportional to 667,252.21, 920,873.91 and 380,815.15 is: 525,562.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,252.21 : 920,873.91 = 380,815.15 : x
  2. Step 2: Convert to fraction form
    667,252.21/920,873.91 = 380,815.15/x
  3. Step 3: Cross multiply
    667,252.21x = 920,873.91 × 380,815.15
  4. Step 4: Simplify right side
    667,252.21x = 350,682,736,167.74
  5. Step 5: Solve for x
    x = 350,682,736,167.74/667,252.21
  6. Step 6: Final answer
    x = 525,562.49

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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.