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Finding the Fourth Proportional to 978,504.20, 1,467,756.30 and 679,905.80

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Solution

The fourth proportional to 978,504.20, 1,467,756.30 and 679,905.80 is: 1,019,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,504.20 : 1,467,756.30 = 679,905.80 : x
  2. Step 2: Convert to fraction form
    978,504.20/1,467,756.30 = 679,905.80/x
  3. Step 3: Cross multiply
    978,504.20x = 1,467,756.30 × 679,905.80
  4. Step 4: Simplify right side
    978,504.20x = 997,936,021,356.54
  5. Step 5: Solve for x
    x = 997,936,021,356.54/978,504.20
  6. Step 6: Final answer
    x = 1,019,858.70

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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.