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Finding the Fourth Proportional to 308.12, 427.04 and 302.36

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Solution

The fourth proportional to 308.12, 427.04 and 302.36 is: 419.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.12 : 427.04 = 302.36 : x
  2. Step 2: Convert to fraction form
    308.12/427.04 = 302.36/x
  3. Step 3: Cross multiply
    308.12x = 427.04 × 302.36
  4. Step 4: Simplify right side
    308.12x = 129,116.17
  5. Step 5: Solve for x
    x = 129,116.17/308.12
  6. Step 6: Final answer
    x = 419.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.