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Finding the Fourth Proportional to 984,990.60, 1,477,485.90 and 978,769.80

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Solution

The fourth proportional to 984,990.60, 1,477,485.90 and 978,769.80 is: 1,468,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    984,990.60 : 1,477,485.90 = 978,769.80 : x
  2. Step 2: Convert to fraction form
    984,990.60/1,477,485.90 = 978,769.80/x
  3. Step 3: Cross multiply
    984,990.60x = 1,477,485.90 × 978,769.80
  4. Step 4: Simplify right side
    984,990.60x = 1,446,118,578,845.82
  5. Step 5: Solve for x
    x = 1,446,118,578,845.82/984,990.60
  6. Step 6: Final answer
    x = 1,468,154.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.