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Finding the Fourth Proportional to 984.96, 1,477.80 and 574.02

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Solution

The fourth proportional to 984.96, 1,477.80 and 574.02 is: 861.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.96 : 1,477.80 = 574.02 : x
  2. Step 2: Convert to fraction form
    984.96/1,477.80 = 574.02/x
  3. Step 3: Cross multiply
    984.96x = 1,477.80 × 574.02
  4. Step 4: Simplify right side
    984.96x = 848,286.76
  5. Step 5: Solve for x
    x = 848,286.76/984.96
  6. Step 6: Final answer
    x = 861.24

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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.