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Finding the Fourth Proportional to 984.56, 1,473.72 and 550.40

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Solution

The fourth proportional to 984.56, 1,473.72 and 550.40 is: 823.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.56 : 1,473.72 = 550.40 : x
  2. Step 2: Convert to fraction form
    984.56/1,473.72 = 550.40/x
  3. Step 3: Cross multiply
    984.56x = 1,473.72 × 550.40
  4. Step 4: Simplify right side
    984.56x = 811,135.49
  5. Step 5: Solve for x
    x = 811,135.49/984.56
  6. Step 6: Final answer
    x = 823.86

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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.