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Finding the Fourth Proportional to 1,490.97, 2,057.67 and 827.81

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Solution

The fourth proportional to 1,490.97, 2,057.67 and 827.81 is: 1,142.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.97 : 2,057.67 = 827.81 : x
  2. Step 2: Convert to fraction form
    1,490.97/2,057.67 = 827.81/x
  3. Step 3: Cross multiply
    1,490.97x = 2,057.67 × 827.81
  4. Step 4: Simplify right side
    1,490.97x = 1,703,345.38
  5. Step 5: Solve for x
    x = 1,703,345.38/1,490.97
  6. Step 6: Final answer
    x = 1,142.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.