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Finding the Fourth Proportional to 1,318,878.60, 1,978,836.30 and 520,024.20

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Solution

The fourth proportional to 1,318,878.60, 1,978,836.30 and 520,024.20 is: 780,240.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,878.60 : 1,978,836.30 = 520,024.20 : x
  2. Step 2: Convert to fraction form
    1,318,878.60/1,978,836.30 = 520,024.20/x
  3. Step 3: Cross multiply
    1,318,878.60x = 1,978,836.30 × 520,024.20
  4. Step 4: Simplify right side
    1,318,878.60x = 1,029,042,763,838.46
  5. Step 5: Solve for x
    x = 1,029,042,763,838.46/1,318,878.60
  6. Step 6: Final answer
    x = 780,240.70

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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.