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Finding the Fourth Proportional to 978,384.70, 1,467,577.05 and 820,920.70

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Solution

The fourth proportional to 978,384.70, 1,467,577.05 and 820,920.70 is: 1,231,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,384.70 : 1,467,577.05 = 820,920.70 : x
  2. Step 2: Convert to fraction form
    978,384.70/1,467,577.05 = 820,920.70/x
  3. Step 3: Cross multiply
    978,384.70x = 1,467,577.05 × 820,920.70
  4. Step 4: Simplify right side
    978,384.70x = 1,204,764,379,189.94
  5. Step 5: Solve for x
    x = 1,204,764,379,189.94/978,384.70
  6. Step 6: Final answer
    x = 1,231,381.05

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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.