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Finding the Fourth Proportional to 540.92, 809.66 and 418.84

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Solution

The fourth proportional to 540.92, 809.66 and 418.84 is: 626.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.92 : 809.66 = 418.84 : x
  2. Step 2: Convert to fraction form
    540.92/809.66 = 418.84/x
  3. Step 3: Cross multiply
    540.92x = 809.66 × 418.84
  4. Step 4: Simplify right side
    540.92x = 339,117.99
  5. Step 5: Solve for x
    x = 339,117.99/540.92
  6. Step 6: Final answer
    x = 626.93

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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.