Home / 1,960.12-2,938.29-660.88

Finding the Fourth Proportional to 1,960.12, 2,938.29 and 660.88

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Solution

The fourth proportional to 1,960.12, 2,938.29 and 660.88 is: 990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.12 : 2,938.29 = 660.88 : x
  2. Step 2: Convert to fraction form
    1,960.12/2,938.29 = 660.88/x
  3. Step 3: Cross multiply
    1,960.12x = 2,938.29 × 660.88
  4. Step 4: Simplify right side
    1,960.12x = 1,941,857.10
  5. Step 5: Solve for x
    x = 1,941,857.10/1,960.12
  6. Step 6: Final answer
    x = 990.68

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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.