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Finding the Fourth Proportional to 978,216.48, 1,469,576.52 and 690,692.40

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Solution

The fourth proportional to 978,216.48, 1,469,576.52 and 690,692.40 is: 1,037,628.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,216.48 : 1,469,576.52 = 690,692.40 : x
  2. Step 2: Convert to fraction form
    978,216.48/1,469,576.52 = 690,692.40/x
  3. Step 3: Cross multiply
    978,216.48x = 1,469,576.52 × 690,692.40
  4. Step 4: Simplify right side
    978,216.48x = 1,015,025,333,582.45
  5. Step 5: Solve for x
    x = 1,015,025,333,582.45/978,216.48
  6. Step 6: Final answer
    x = 1,037,628.54

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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.