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Finding the Fourth Proportional to 1,958.46, 2,937.68 and 659.92

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Solution

The fourth proportional to 1,958.46, 2,937.68 and 659.92 is: 989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.46 : 2,937.68 = 659.92 : x
  2. Step 2: Convert to fraction form
    1,958.46/2,937.68 = 659.92/x
  3. Step 3: Cross multiply
    1,958.46x = 2,937.68 × 659.92
  4. Step 4: Simplify right side
    1,958.46x = 1,938,633.79
  5. Step 5: Solve for x
    x = 1,938,633.79/1,958.46
  6. Step 6: Final answer
    x = 989.88

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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.