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Finding the Fourth Proportional to 401.98, 554.75 and 303.57

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Solution

The fourth proportional to 401.98, 554.75 and 303.57 is: 418.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.98 : 554.75 = 303.57 : x
  2. Step 2: Convert to fraction form
    401.98/554.75 = 303.57/x
  3. Step 3: Cross multiply
    401.98x = 554.75 × 303.57
  4. Step 4: Simplify right side
    401.98x = 168,401.17
  5. Step 5: Solve for x
    x = 168,401.17/401.98
  6. Step 6: Final answer
    x = 418.93

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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.