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Finding the Fourth Proportional to 401.40, 554.10 and 303.18

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Solution

The fourth proportional to 401.40, 554.10 and 303.18 is: 418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.40 : 554.10 = 303.18 : x
  2. Step 2: Convert to fraction form
    401.40/554.10 = 303.18/x
  3. Step 3: Cross multiply
    401.40x = 554.10 × 303.18
  4. Step 4: Simplify right side
    401.40x = 167,992.04
  5. Step 5: Solve for x
    x = 167,992.04/401.40
  6. Step 6: Final answer
    x = 418.52

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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.