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Finding the Fourth Proportional to 984.59, 1,474.60 and 618.27

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Solution

The fourth proportional to 984.59, 1,474.60 and 618.27 is: 925.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.59 : 1,474.60 = 618.27 : x
  2. Step 2: Convert to fraction form
    984.59/1,474.60 = 618.27/x
  3. Step 3: Cross multiply
    984.59x = 1,474.60 × 618.27
  4. Step 4: Simplify right side
    984.59x = 911,700.94
  5. Step 5: Solve for x
    x = 911,700.94/984.59
  6. Step 6: Final answer
    x = 925.97

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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.