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Finding the Fourth Proportional to 1,319,252.80, 1,978,015.20 and 520,052.80

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Solution

The fourth proportional to 1,319,252.80, 1,978,015.20 and 520,052.80 is: 779,738.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,252.80 : 1,978,015.20 = 520,052.80 : x
  2. Step 2: Convert to fraction form
    1,319,252.80/1,978,015.20 = 520,052.80/x
  3. Step 3: Cross multiply
    1,319,252.80x = 1,978,015.20 × 520,052.80
  4. Step 4: Simplify right side
    1,319,252.80x = 1,028,672,343,202.56
  5. Step 5: Solve for x
    x = 1,028,672,343,202.56/1,319,252.80
  6. Step 6: Final answer
    x = 779,738.61

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