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Finding the Fourth Proportional to 308.04, 427.95 and 305.22

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Solution

The fourth proportional to 308.04, 427.95 and 305.22 is: 424.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.04 : 427.95 = 305.22 : x
  2. Step 2: Convert to fraction form
    308.04/427.95 = 305.22/x
  3. Step 3: Cross multiply
    308.04x = 427.95 × 305.22
  4. Step 4: Simplify right side
    308.04x = 130,618.90
  5. Step 5: Solve for x
    x = 130,618.90/308.04
  6. Step 6: Final answer
    x = 424.03

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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.