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Finding the Fourth Proportional to 1,958.10, 2,937.32 and 641.86

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Solution

The fourth proportional to 1,958.10, 2,937.32 and 641.86 is: 962.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.10 : 2,937.32 = 641.86 : x
  2. Step 2: Convert to fraction form
    1,958.10/2,937.32 = 641.86/x
  3. Step 3: Cross multiply
    1,958.10x = 2,937.32 × 641.86
  4. Step 4: Simplify right side
    1,958.10x = 1,885,348.22
  5. Step 5: Solve for x
    x = 1,885,348.22/1,958.10
  6. Step 6: Final answer
    x = 962.85

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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.