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Finding the Fourth Proportional to 1,962.85, 2,942.45 and 663.41

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Solution

The fourth proportional to 1,962.85, 2,942.45 and 663.41 is: 994.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,962.85 : 2,942.45 = 663.41 : x
  2. Step 2: Convert to fraction form
    1,962.85/2,942.45 = 663.41/x
  3. Step 3: Cross multiply
    1,962.85x = 2,942.45 × 663.41
  4. Step 4: Simplify right side
    1,962.85x = 1,952,047.44
  5. Step 5: Solve for x
    x = 1,952,047.44/1,962.85
  6. Step 6: Final answer
    x = 994.50

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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.