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Finding the Fourth Proportional to 2,958.65, 4,438.40 and 983.61

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Solution

The fourth proportional to 2,958.65, 4,438.40 and 983.61 is: 1,475.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,958.65 : 4,438.40 = 983.61 : x
  2. Step 2: Convert to fraction form
    2,958.65/4,438.40 = 983.61/x
  3. Step 3: Cross multiply
    2,958.65x = 4,438.40 × 983.61
  4. Step 4: Simplify right side
    2,958.65x = 4,365,654.62
  5. Step 5: Solve for x
    x = 4,365,654.62/2,958.65
  6. Step 6: Final answer
    x = 1,475.56

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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.