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Finding the Fourth Proportional to 1,892.78, 2,839.38 and 660.08

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Solution

The fourth proportional to 1,892.78, 2,839.38 and 660.08 is: 990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,892.78 : 2,839.38 = 660.08 : x
  2. Step 2: Convert to fraction form
    1,892.78/2,839.38 = 660.08/x
  3. Step 3: Cross multiply
    1,892.78x = 2,839.38 × 660.08
  4. Step 4: Simplify right side
    1,892.78x = 1,874,217.95
  5. Step 5: Solve for x
    x = 1,874,217.95/1,892.78
  6. Step 6: Final answer
    x = 990.19

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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.