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Finding the Fourth Proportional to 1,319,267.80, 1,978,037.70 and 520,067.80

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Solution

The fourth proportional to 1,319,267.80, 1,978,037.70 and 520,067.80 is: 779,761.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,267.80 : 1,978,037.70 = 520,067.80 : x
  2. Step 2: Convert to fraction form
    1,319,267.80/1,978,037.70 = 520,067.80/x
  3. Step 3: Cross multiply
    1,319,267.80x = 1,978,037.70 × 520,067.80
  4. Step 4: Simplify right side
    1,319,267.80x = 1,028,713,714,956.06
  5. Step 5: Solve for x
    x = 1,028,713,714,956.06/1,319,267.80
  6. Step 6: Final answer
    x = 779,761.10

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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.