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Finding the Fourth Proportional to 401.99, 554.70 and 254.69

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Solution

The fourth proportional to 401.99, 554.70 and 254.69 is: 351.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.99 : 554.70 = 254.69 : x
  2. Step 2: Convert to fraction form
    401.99/554.70 = 254.69/x
  3. Step 3: Cross multiply
    401.99x = 554.70 × 254.69
  4. Step 4: Simplify right side
    401.99x = 141,276.54
  5. Step 5: Solve for x
    x = 141,276.54/401.99
  6. Step 6: Final answer
    x = 351.44

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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.