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Finding the Fourth Proportional to 308.07, 424.95 and 191.63

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Solution

The fourth proportional to 308.07, 424.95 and 191.63 is: 264.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.07 : 424.95 = 191.63 : x
  2. Step 2: Convert to fraction form
    308.07/424.95 = 191.63/x
  3. Step 3: Cross multiply
    308.07x = 424.95 × 191.63
  4. Step 4: Simplify right side
    308.07x = 81,433.51
  5. Step 5: Solve for x
    x = 81,433.51/308.07
  6. Step 6: Final answer
    x = 264.33

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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.