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Finding the Fourth Proportional to 1,149, 1,723.84 and 662.40

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Solution

The fourth proportional to 1,149, 1,723.84 and 662.40 is: 993.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149 : 1,723.84 = 662.40 : x
  2. Step 2: Convert to fraction form
    1,149/1,723.84 = 662.40/x
  3. Step 3: Cross multiply
    1,149x = 1,723.84 × 662.40
  4. Step 4: Simplify right side
    1,149x = 1,141,871.62
  5. Step 5: Solve for x
    x = 1,141,871.62/1,149
  6. Step 6: Final answer
    x = 993.80

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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.