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Finding the Fourth Proportional to 1,960.50, 2,942.10 and 806.25

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Solution

The fourth proportional to 1,960.50, 2,942.10 and 806.25 is: 1,209.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.50 : 2,942.10 = 806.25 : x
  2. Step 2: Convert to fraction form
    1,960.50/2,942.10 = 806.25/x
  3. Step 3: Cross multiply
    1,960.50x = 2,942.10 × 806.25
  4. Step 4: Simplify right side
    1,960.50x = 2,372,068.13
  5. Step 5: Solve for x
    x = 2,372,068.13/1,960.50
  6. Step 6: Final answer
    x = 1,209.93

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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.