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Finding the Fourth Proportional to 1,318,892.10, 1,978,856.55 and 520,037.70

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Solution

The fourth proportional to 1,318,892.10, 1,978,856.55 and 520,037.70 is: 780,260.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,892.10 : 1,978,856.55 = 520,037.70 : x
  2. Step 2: Convert to fraction form
    1,318,892.10/1,978,856.55 = 520,037.70/x
  3. Step 3: Cross multiply
    1,318,892.10x = 1,978,856.55 × 520,037.70
  4. Step 4: Simplify right side
    1,318,892.10x = 1,029,080,008,891.94
  5. Step 5: Solve for x
    x = 1,029,080,008,891.94/1,318,892.10
  6. Step 6: Final answer
    x = 780,260.95

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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.