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Finding the Fourth Proportional to 1,958.15, 2,937.59 and 659.59

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Solution

The fourth proportional to 1,958.15, 2,937.59 and 659.59 is: 989.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.15 : 2,937.59 = 659.59 : x
  2. Step 2: Convert to fraction form
    1,958.15/2,937.59 = 659.59/x
  3. Step 3: Cross multiply
    1,958.15x = 2,937.59 × 659.59
  4. Step 4: Simplify right side
    1,958.15x = 1,937,604.99
  5. Step 5: Solve for x
    x = 1,937,604.99/1,958.15
  6. Step 6: Final answer
    x = 989.51

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1.5x scale

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.