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Finding the Fourth Proportional to 401.55, 554.29 and 254.40

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Solution

The fourth proportional to 401.55, 554.29 and 254.40 is: 351.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.55 : 554.29 = 254.40 : x
  2. Step 2: Convert to fraction form
    401.55/554.29 = 254.40/x
  3. Step 3: Cross multiply
    401.55x = 554.29 × 254.40
  4. Step 4: Simplify right side
    401.55x = 141,011.38
  5. Step 5: Solve for x
    x = 141,011.38/401.55
  6. Step 6: Final answer
    x = 351.17

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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.