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Finding the Fourth Proportional to 1,490.69, 2,057.09 and 827.49

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Solution

The fourth proportional to 1,490.69, 2,057.09 and 827.49 is: 1,141.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.69 : 2,057.09 = 827.49 : x
  2. Step 2: Convert to fraction form
    1,490.69/2,057.09 = 827.49/x
  3. Step 3: Cross multiply
    1,490.69x = 2,057.09 × 827.49
  4. Step 4: Simplify right side
    1,490.69x = 1,702,221.40
  5. Step 5: Solve for x
    x = 1,702,221.40/1,490.69
  6. Step 6: Final answer
    x = 1,141.90

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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.