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Finding the Fourth Proportional to 378,994.72, 567,870 and 129,540.64

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Solution

The fourth proportional to 378,994.72, 567,870 and 129,540.64 is: 194,098.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,994.72 : 567,870 = 129,540.64 : x
  2. Step 2: Convert to fraction form
    378,994.72/567,870 = 129,540.64/x
  3. Step 3: Cross multiply
    378,994.72x = 567,870 × 129,540.64
  4. Step 4: Simplify right side
    378,994.72x = 73,562,243,236.80
  5. Step 5: Solve for x
    x = 73,562,243,236.80/378,994.72
  6. Step 6: Final answer
    x = 194,098.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.