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Finding the Fourth Proportional to 308.02, 424.91 and 219.63

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Solution

The fourth proportional to 308.02, 424.91 and 219.63 is: 302.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.02 : 424.91 = 219.63 : x
  2. Step 2: Convert to fraction form
    308.02/424.91 = 219.63/x
  3. Step 3: Cross multiply
    308.02x = 424.91 × 219.63
  4. Step 4: Simplify right side
    308.02x = 93,322.98
  5. Step 5: Solve for x
    x = 93,322.98/308.02
  6. Step 6: Final answer
    x = 302.98

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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.