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Finding the Fourth Proportional to 401.36, 554.20 and 270.64

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Solution

The fourth proportional to 401.36, 554.20 and 270.64 is: 373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.36 : 554.20 = 270.64 : x
  2. Step 2: Convert to fraction form
    401.36/554.20 = 270.64/x
  3. Step 3: Cross multiply
    401.36x = 554.20 × 270.64
  4. Step 4: Simplify right side
    401.36x = 149,988.69
  5. Step 5: Solve for x
    x = 149,988.69/401.36
  6. Step 6: Final answer
    x = 373.70

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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.