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Finding the Fourth Proportional to 1,811.40, 2,490.03 and 1,633.20

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Solution

The fourth proportional to 1,811.40, 2,490.03 and 1,633.20 is: 2,245.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.40 : 2,490.03 = 1,633.20 : x
  2. Step 2: Convert to fraction form
    1,811.40/2,490.03 = 1,633.20/x
  3. Step 3: Cross multiply
    1,811.40x = 2,490.03 × 1,633.20
  4. Step 4: Simplify right side
    1,811.40x = 4,066,717.00
  5. Step 5: Solve for x
    x = 4,066,717.00/1,811.40
  6. Step 6: Final answer
    x = 2,245.07

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.