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Finding the Fourth Proportional to 551.03, 759.96 and 401.65

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Solution

The fourth proportional to 551.03, 759.96 and 401.65 is: 553.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.03 : 759.96 = 401.65 : x
  2. Step 2: Convert to fraction form
    551.03/759.96 = 401.65/x
  3. Step 3: Cross multiply
    551.03x = 759.96 × 401.65
  4. Step 4: Simplify right side
    551.03x = 305,236.03
  5. Step 5: Solve for x
    x = 305,236.03/551.03
  6. Step 6: Final answer
    x = 553.94

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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.