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Finding the Fourth Proportional to 2,607.97, 3,912.09 and 660.19

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Solution

The fourth proportional to 2,607.97, 3,912.09 and 660.19 is: 990.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.97 : 3,912.09 = 660.19 : x
  2. Step 2: Convert to fraction form
    2,607.97/3,912.09 = 660.19/x
  3. Step 3: Cross multiply
    2,607.97x = 3,912.09 × 660.19
  4. Step 4: Simplify right side
    2,607.97x = 2,582,699.84
  5. Step 5: Solve for x
    x = 2,582,699.84/2,607.97
  6. Step 6: Final answer
    x = 990.31

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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.