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Finding the Fourth Proportional to 663.27, 990.44 and 541.77

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Solution

The fourth proportional to 663.27, 990.44 and 541.77 is: 809.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.27 : 990.44 = 541.77 : x
  2. Step 2: Convert to fraction form
    663.27/990.44 = 541.77/x
  3. Step 3: Cross multiply
    663.27x = 990.44 × 541.77
  4. Step 4: Simplify right side
    663.27x = 536,590.68
  5. Step 5: Solve for x
    x = 536,590.68/663.27
  6. Step 6: Final answer
    x = 809.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.